I had been dealing with storage issues on my phone for months and finally decided to come into T-Mobile to get it handled. Tristan helped me out and made the whole process super smooth. He took the time to explain all the benefits of the new iPhone 17 Pro (I use my phone a lot for work), answered all my questions clearly, and made sure I understood everything before moving forward. He also got me in and out quickly, which I really appreciated. Very thankful for Tristan's help, great customer service all around. I definitely recommend this location for your phone needs. Ask for Tristan! read more

I purchased my new IPhone 17 today. I want to thank Mobile Expert Ray Ramirez. I couldn't order the phone via online. So, I decided to personally walk into the walnut store. Ray made it so easy to complete my order. He explained the process and the phone. Also, recommended several other items. He definitely knows what he is talking about. I was frustrated with the online situation. Once I came out of the store, I was a satisfied customer! Great job Ray! read more

No Star! Take your business somewhere else, not only that T-Mobile's network is unreliable, the Customer Service (aka mobile expert), promotion, etc is extremely poor. Super bad! Don't get fooled with the offer, once you leave the store, a day after you signup, your bill doubled! They're extremely rude! Don't go to this store! The people who works here are scammers! Stay with your current provider! read more

Fan fan fan. Great service nice signals all five g. The fastest five g around. Speed of Asia. Fast great nice

My family and I, recently switched to T-Mobile. We were tired of our old phone provider and were looking for a more affordable phone and internet option. So we went to our local T-Mobile store and got a great deal on phones and a home internet package. They even gave us a 14 day trial of the internet before committing to the service. So far everything has been great and I'm happy with the service and the customer service from the sales rep at the store was great. I highly recommend T-Mobile. read more

Most T Mobile workers are not good, but this location takes the top spot for worst customer service. As I'm taking a look at the new iPhone 16 Pro Max I overhear the young man helping an older man, just completely belittle him every chance he got. The older man had an accent and clearly doesn't have perfect english. Once these people leave the store, the customers(a young lady and the gentleman) continue to speak badly about their customers, with the young lady saying loud and clear "IF THEY WANT CHICK FIL A SERVICE THEN THEY CAN GO TO CHICK FIL A". I had already knew they weren't going to help me out. Low and behold, the young lady could not do a single thing to help me upgrade my phone although I was 100% prepared. read more

Grand and Valley Store. Bad services, came in and Ray was serving, then need to update account, need me to call 611 to update, otherwise cannot process. stay outside store and called, after completed, wait again in long line again. I was asking Ray but he ignored me then to serve another potential buyer, At the communication, Ray refused to serve me and asked me to leave, he said that "he has the right to refuse customer", the worse customer service I've ever had. read more

I've been to this location twice and both times felt the same. I needed to upgrade my plans from being a customer of over 20 years. Not helpful, they were rude and condescending stating it was a legacy plan and didn't really want to address any comparisons to the new plan. They dismissed me and I left this retail store never wanting to come back. Ironically I called from the parking lot and spent 30 mins with a very well represented t mobile rep over the phone. I upgraded plans for all lines and even got 2 new iphones. ... So some time later.. like 10 days, I finally upgraded the 2 iphones and they were ready to be returned. I was hesitant but what harm if I'm just returning phones... Decided to give them another shot, maybe caught them on a bad day. Walked in. Scoped around. 3 or 4 sitting around chatting at a table while another rep/or maybe not a rep but was having personal issues on the company land line for the whole duration I was there. . Either or doesn't matter. Just need to get my phones returned and I'm good. Rep that helped me was through.. which was good. Thought we were done until the end. He walked out from back offering me a free promo line .. since I'm a long term customer... I said nothing is free... nothing.. nope.. don't need it, want it.. then his manager comes from table and reassures .. this is legit. It's free. I said once again. Nothing is free. Manager reassures again, they have had customers with this promo... I kept saying nothing is free. Dont have a need.. they said they use it and use as loaners or sublease to others...it's useful.. And again they promise it will not come up on the bill... I succumb, they charge me $10 for a Sim card and had me pick a number.. I don't even have a phone for it.... dont need it, so of course I'm still skeptical. 10 days later I call in, make sure its not on bill... I see a new line.. no devices attached .. becuase I don't have a need for it. Never used Sim. But bill remains same. I call back 10 days later... hmm.. extra line, extra rate, $35 plus $23 prorate for March to April... I call in again... this time rep says nope, walked thru everything and not a free line. 20 mins later we went thru all promos and they said yup got the iphone promo. Other promos don't apply to you. Then the free line is if you got a line.. which I never did. I was hesitant from day 1 for a reason. I should known better. 30 mins later rep on phone got the $23 removed, then $35.. for next cycle.. but my autopay already ran thru and odds and ends were charged. They supposedly removed that nee line now but wont come off till next billing cycle. All in all... nothing in life is free... I now need to keep checking in again to see if indeed it comes off the bill. I have a useless Sim I paid $10 for.. other fees applies since this month bill was higher, even after the credit reapplied. And ti be honest i dont care, just want that line gone.... bottom line, I walked in day 1 for a new plan and phones, didn't get the help, didn't feel right, got it with tmobile phone reps. Then on 4/4 went in to trade in phones, ho harm i thought, and walked out with misrepresented info about a free line and time and $$ I won't get back because i didn't stay firm with my beliefs. Read fine print, in this case there wasn't any, just took the word of the Manager and his rep. I don't think there will be a 3rd time visit to this location. Oh by the way, it was the same Manager there day 1 as the one that assured me it's 1000% free, no impact, no problems, your bill will not change. His promise. read more

Was I ever lucky! 3 clerks working. And a couple ahead of me. They had been waiting 40 minutes. Then a clerk left. But alas alack! Another clerk became available. And it was a quick fix.. Next! These guys are very helpful they can't help it if they are understaffed. They work hard to give individual attention to each customer. read more

Super busy and no one greeting customers, letting people know the wait times, stood there for a couple of minutes was looked at but never acknowledged read more

Came to the store today to ask about a new T-Mobile promotion and had a fantastic experience. I want to highlight Octavio, who really took the time to talk us through the fine text of the offer and alternative options available to us even when it became apparent that I wouldn't be able to take advantage of the promotion in question. Octavio was very transparent with us and incredibly knowledgeable, which was clear in the straightforward and clear answers he had to our (many) questions. T-Mobile support can be a big hit or miss, but this was definitely a big hit. No frustration or confusion at all, which I've always associated with T-Mobile in the past. If you're close enough for a visit, definitely choose this place over waiting on hold or dealing with convoluted non-answers over chat. read more

Joshua L is super helpful and professional! Great customer service and appreciate the prompt response

I could not figure out why the woman that was being helped before me was rolling her eyes and looking disgusted. I quickly found out when I was helped by Carlos. Just plain rude. read more

Can today to put a new SIM to a new Samsung that have not been use. Tony was awesome! He tried multiple times to trouble shoot the problem while enjoying the conversation while waiting. We end up trading in the existing phone for a new phone with promotions for FREE!!! How awesome is that!!! Thank you TONY, you have make our day. read more

A few weeks ago I called this Tmobile store and asked some questions to see if I could be helped with the services I needed. I wanted to pull my line from one account to create my own account with same line. I made the mistake of not asking the name of the person that I spoke to for 9 minutes. After confirming that I could be helped, I drove to this store. I walked in and they tell me that they cannot help me because the service I needed could only be done "remotely" and not in store. I proceeded to say that I had just been told over the phone that I could be helped. I even showed the sales person my call log with their phone number and the call time of 9 minutes from the same day shortly before making the drive. I ended up leaving this store since they couldn't help me. The whole point of anyone calling an establishment is to not waste anyone's time or gas etc. Fast forward to today, I called a Tmobile store in Azusa because I needed to purchase a new phone etc. The sales rep was very friendly on the phone and confirmed that she could help me once I arrived at store. I was able to purchase a new phone and she answered all the questions I had. Her name is Jasmine and if you're looking for a great and helpful experience you will for sure receive it there at 1250 W. Foothill Blvd in Azusa. Lastly, Jasmine provided great service without knowing of my horrible experience at the Azusa store. I shared my experience with her after I had already paid for my new phone and I was about to exit the store. Thank you to the Azusa Tmobile store for your help and excellent customer service!! read more

I've had to come back here 5 times now. Apparently there is not a single person here who can solve my problem, giving me cellular service (which I've paid for and not received for the last 5 days) I was told to go to the Apple Store, and they referred me back here, to only be told that they had never seen my issue before and therefore could only make attempts. read more

Homeboy Arnold was super nice and very helpful! He kept saying if anything happened at all to come back and back and he'd fix my devices no questions asked. Awesome service! read more

I came here shopping for phones recently. I was "helped" by 2 different people at different times because the original salesman that I spoke to the first time wasn't there the second time I showed up. On my third time there, both salesmen were there at the same time. The first salesman wanted the sale, but, I didn't think he was particularly helpful. The second salesman who was helpful didn't want to help me because he found out I had spoken to saleman #1. At that point, I wanted to leave the store. But, it was too late. Salesman #1 helped me. Salesman #2 refuses to talk to me. I came here for a phone, not an attitude. The salesmen working here need to grow up. There must be a T-Mobile store somewhere with professional salesmen and saleswomen. read more

If I can give negative thousand stars to this store and their sale prep! I will sure do that. I stop by this store today to get my new phone. First, the girl sale prep said it was out of stock. Then she said that the requirement for me to get the 6S is to add another line to my plan. Lady, 1 week ago my sister got the same phone for $350 + tax without adding any line at another T-Mobile store. Now you play this thing with me and the attitude of prefer the richer! Let's me tell you what! I got my new phone at the same store my sister did! Get your promotion fact right! Or quick your job! read more

My partner decided to change carrier to t-mobile and he availed the their promotion with 2 i phones included aside from the line. My partner live in vegas and sent me my new iphone, my partner instructed me to go to the nearest t mobile which i did and just let them know that my phone needed to be activated. I went to this store then one of the guy there assisted me, i provided all the info that he needed but unfortunately he said he couldn't activate my phone bc he needs my partner to be there, i explained to him that he was in vegas. In short he didn't helped me to activate my phone. That guy wasn't very helpful to their customer and i didn't hear any apology from him. So i wouldn't recommend this place if u want their services. I am not gonna come again to this place read more

This location is very convenient....their T Mobile Associate Arnold gave excellent customer service and is very knowledgeable! This is my go to store for any phone device service or questions. read more

30 minutes in and out. Switching over from sucky SPRINT to T-Mobile was the easiest process ever, all on my lunch break. On my old plan I had weak, spotty coverage and just 2GB data but now I have strong, wide coverage and 10GB data that I'll rarely exceed. Very happy for the new plan and had an excellent experience at this location. Highly recommended. read more

This T-Mobile is awful customer service I went in to get a watch connected which I had already done yesterday and I had to come back on their behalf and they couldn't help me and figure something out without an id when I could provide a social number and everything . This place is super unprofessional and seriously wasted my time!!b zero stars for this place do not come here !!b save yourself your time! read more

Seriously worst service ever. I've been coming here for years and have never been treated like that. I went in cause my brand new phone wasn't notifying of my messages coming in. I looked up the issue online to try and fix it first and tried everything they suggested and thought it could be another issue with the actual phone. So I went in just giving up hope. I explained what i thought it could be, at least coming in with some sort of attempt and suggestions hoping they could resolve it, as they are the "professionals". After two associates played with it for about 5 minutes they found the issue, great! But instead of being courteous and fixing it and maybe making a little joke about how simple it was they ended up just laughing about it in my face and making fun of me. I know how to make fun of myself and now see how ridiculous the problem was and how easy the fix was. But do not laugh at your customers in their face, dangle their phone away from them, and mimic their voices! That is not professionalism at all! A Yelp review is not the only thing these boys will hear from me! read more

I went to this store today, to get help with my phone. Brianna was very courteous, friendly and helpful. I ran into Octavio, also. He was really nice too. I think they will do well in this business, helping the customers with their expertise, along with patience and compassion. read more

Compared to other T-Mobile locations, this store was super clean and had friendly/knowledgeable mobile experts. Had a great experience and will come back again. read more

I had a horrible experience at the T-Mobile in Diamond Bar Blvd and Grand. I was the only person in the store, where the two men providing service barely spoke to me and were unfriendly, Eric and Peng. They spoke to each other in a language I obviously did not understand; this made me feel uncomfortable as I didn't know what they were talking about and what they were doing with my phones, I could only assume the best but their coldness wasn't reassuring. I asked them to clear phone 1, transfer the number, and transfer data from phone 2 to phone 1. They only transferred the phone number, they didn't bother calling it to ensure it worked, and I felt I had to continue to ask questions to get answers. I asked if they had cleared the phone and Eric said "we tried" which they did not, it is easy to do once I figured it out at home. Very unprofessional. Most importantly, you'd think with COVID they'd sanitize my phones before and after returning them to me, but they did not. Overall, I was poorly served and left to go home, when I was the only one to help. Perhaps I interrupted their social hour. In a panic, once home, I called the Walnut store as I was worried about what was done or not done by the Diamond Bar store. Octavio answered, heard my complaint, was professional, kind, knowledgeable, and instantly gained my trust. He helped by instructing me on what to do with my phones. I cleared the phone at home, something the representatives in Diamond Bar could've easily done but did not try at all. I'm grateful for Octavio at the Walnut store and his superb customer service, unfortunately, I will never return to the Diamond Bar store which is unfortunate as it is less than 5 minutes from home. I've had Sprint for over 15 years and lived in Diamond Bar longer. I wish there was consistent service at every store but unfortunately, there are those who go beyond supporting customers and those that do the bare minimum. Thank you, Octavio, you improved my experience with T-Mobile/Sprint. read more

I love this T-Mobile location! The service is always excellent and best customer service. Today in the a.m. I was greeted by Richard, then Sharon came out while Richard was getting my new iphone 6 for me asked if I had been helped. I told Richard that I had to get to work right away in Pasadena and he moved so quick and helped me with basic set up etc. I told him that I didn't have time to transfer my contacts and would come back later. He then placed a note on my old phone to be held for a couple of days. I returned the same evening and was greeted by Asad who was so patient with me and transferred by contacts. Jackie was there to and added some input for the contacts transfer. My old phone was acting up. This is the only T-Mobile store I shop at as I've been to others which were very under par. Thanks T-Mobile Team City of Industry! You are the best read more

We live in La Puente and drive all the way to this store because Celine always takes care of my family. Best customer service, very patient and explains everything in detail. Definitely recommend this store for her alone :) read more

A very long time T-Mobile customer. I was wanting to upgrade my phone and check out what's new. Walked in and not greeted or told I'll be with you in a minute. Checked out some phones for about 10 minutes and no one asked if I needed anything. Left with no acknowledgement from staff. Won't be back. read more

I was looking for a simple phone for my son. I went to this location since it was near to me. I waited for my turn and the asian lady helped me. She provided informations needed for me to decide which phone to purchase. I was satisfied with the service and surely will go back again when i need a new phone. read more

Having been a Verizon customer for over twenty years, the wife and I decided to drop by to see what plans T-Mobile offered with the new Samsung Note 8. There were three employees and another couple in there. We were in the store for a good five minutes and not one of the employees acknowledged our presence. One was talking on the phone, another one walked right pass us and left the store. During the whole time no one said " Hi, we'll be right with you." No one made eye contact. I sure hope they are all financially independent because it will be difficult for them to actually make a living. read more

I contacted T-Mobile chat support this morning because of issues with my Internet. It took 62 minutes for them to say " I will now call Technical Support to try to resolve this." They then disconnected the call and never did resolve it. They take very little concern about wasting the customers time. read more

I went to this location yesterday to get assistance for my phone . I just bought a new simcard from them but after that there' s seems to be a problem with incoming calls. This guy helped me, Im sorry but I forgot to get his name, sales rep #478. He did everything to fix my phone and he's very knowledgeable and very patient. Now, my phone is fixed, Im already receiving calls. I will definetely go back there. read more

The people that work here are so rude! I was just there trying to get a new phone and this guy Jonathan all he did was in his phone he didn't want to help me at all! I wan it to switch and he could help me at all!! So rude! read more

Best T-Mobile ever! The sales rep helped me out with my phone and helped me so much! She really helped out and fixed my phone! Thnx (:

Me and my mother made the switch from AT&T to T-Mobile a few weeks ago, and the sale representative was Celine. We've been waiting to make the switch once my mom turned 55 to get the Magenta 55 plan. Things seemed good until now. She was telling us how we will receive Netflix and that the bill was going to be $70 rather than $80 once we activated auto-pay. Went to cancel my Netflix account and tried to activate the Netflix they promised, but apparently our plan doesn't come with it. Then we checked our bill and it was $80. We payed that day and she even set up the auto-pay and told us the bill was going to be $70. Called customer support and they told us the bill was $80, and that the $70 will appear on the next bill, and there was no way to refund the $10. Please know your facts before trying to make a sale. read more

I went into this T-mobile location knowing about the bad reviews, but since it was closest to me and it's location is really in a nice area, i figured heck not everyone should have a terrible experience. Boy was i wrong. There were three employees, two females helping out other customers, and a male(I think the manager) just standing by the counter. At first fairly inviting as i gave him my account information, but when i started inquiring about the different plans, the customer service really took a dive. Every question i asked was responded with a distasteful look as if "i should have known the answer already". When i asked if it was possible to take internet service off of one phone line at a reduced cost, the response i got was, "well i'll take off the internet but your cost won't change" followed by insincere look on his face. I'm no customer service expert, but i know what it feels like to really be taken care of on a service level, and when the employees simply just don't want to be there. I really hope T-mobile is reviewing their yelp reviews since a lot of the stores nearby have low ratings as well. read more

This particular branch is extremely bad with customer service. First time. The guy showed me around and explained the plan breakdown. He was cool. surprisingly helpful regarding plans and phone specs. Second time. I called inquiring about the iPhone release dates and had certain questions about my new plan and kept getting a response of "I don't know". They told me there was a list where they would call people about the iPhones being available; I ended that call and the person didn't even get my number. Third time. " The store was in chaos due to release of iPhone. Staff was unprofessional with how they handled their system being down. Long wait, bad explanations regarding phones. After multiple times of what seemed like an attempt at clarification, I gave up and decided to just take what I bought and left. Went to another branch and they fixed all my problems in half the time I spent at this branch. I will never return here again. read more

I Just let this branch know, today they just lost an iphone 5 sale.. The salesmen seems more interested answering "quick" questions from customers who never "waited in line" properly. read more