I had Sprint before T-Mobile merger. Was required to add a SIMS card to phone. I have experienced a lag in reception along with not receiving voicemails immediately. Several voicemails left on 6/18 just came thru today 6/27. Called *2 to inform and was placed on hold and eventually call disconnected. (Call time 18mins) no return call and of course it's required to confirm the phone number your calling from. Not Ok, poor service all around!Their towers suck can't get a reception. Their T-Mobile home internet is unreliable. So if you're thinking on getting it, just go somewhere else. Not worth the time, nor the hafter they bought out Sprint. They've gotten worse. I had phone lines with them. And they went down 3 times a day. Customer care reps don't care all it ISIS money switch why you can or if you're not switch, do not switch.My phone of 6 years fully insured failed. The sales person wanted to sell me a $1000 phone, but failed to recognize that there was an insurance coverage on my existing failed phone being currently covered. Having avoided the questioning repeatedly trying to make a sales he reluctantly gave us the 1,800 number to call for a replacement, since it was obvious he wasn't able to switch and bait us to a perceived upgrade.sale. He couldn't get rid of us fast enough.! Next sucker please! Tip for consumers:Since we use T Mobile for all our company phones I/We will be reviewing our options with this business on its customer ethics Products used:None Service Value QualityTerrible customer service for the business side. The people migrating people over from Sprint have absolutely no Idea how to do there jobs. 25 hours of my time and 4 months still not done! Still in a semi workable Limbo with no end in sight. So many promises broken. I was just told that our 18 line account wasn't big enough for a manager to help with! Tip for consumers:Use someone other than T-Mobile! Service Value Shipping QualityDO NOT GO WITH Tmobile! Could not watch the final 4 basketball games this evening because of low to no internet speeds. All buffering, completely freezing up. Live in Myrtle Beach with closest tower in Charleston. Done everything to get best signals plus ethernet connections to the tower. Is Tmobile throttling down or too many people? Regardless will go back to Spectrum. Don't go with Tmobile until they get a stronger signals or get a closer tower, it is a waste of money if you can't watch tv. Which is the implied warranty for a specific purpose. False advertising on Tmobile's part? QualityI would give them 0 stars. The most horrific experience after being their customer for 11 years almost... Worst customer service ever, with people that are lying in your face when actually don't want or cannot resolve your issues, worst signal and especially if you have a 5G phone don't expect to have 5G signal anywhere. Also I've bought a $1400 Samsung Galaxy S 20 Ultra 5G from them and after only 3 months didn't work properly and they've done nothing for 6 months of weekly complaining. In the end they changed it with a refurbished one the blocked after 2 days. So please do yourself a favor find a better option, my experience was traumatic as I lost many days on the phone with them, not hours, in 6 months I've lost days! Just yesterday the whole day until past midnight when I was done with them for good. Tip for consumers:Run away from TMobile. They will take your money super fast but never care for their customers. Worst signal everywhere and uncapable "specialists" Products used:Cell phone Samsung Galaxy S 20 UltraI asked a T mobile seller for a Canada US Mexico plan. They sold me a $15 plan but charged me $25 (oh yeah, we forgot, you have to pay for sim card too). It did not work to call Canadian numbers. They then sold me a $5 plan to call Canadian numbers. Worked in US, but not in Canada. T-mobile then informed me it would be another $40. Each time they gave me wrong information and will not do anything about it. Waste of time and money. Service Value Returns QualityThis complaint is due to the mistreatment they offer towards clients. I have been with them for seven years. I am trying to find out something about my bill. I called from my cell phone and they have not answered me. They have left me in line waiting, they are very unprofessional, rude and aggressive. They need to be trained and improve customer service and be more human and respect people and customers to improve their service. Service Value Shipping Returns QualityI decided to take advantage of a promotion that was offered to me through my Capital One shopping app. It was a 150 dollar virtual Master Card if I switched to T-Mobile internet. I did so before the promotion expired, then tried to claim my reward. The service rep told me that the promotion had expired in November of last year, which was not true. I even sent a screen shot showing the offer, but they are refusing to honor it. Aside from the promotion issue, it has been one long hassle, with a reduced fee offered to me as a senior citizen, but then being billed a higher amount, and in advance as well although I have only had their internet for two days. I am really disappointed with the whole thing and am considering canceling and keeping my current provider. Products used:The free phone which was included, and the new router. ServiceI called 3 times about charges that is incorrect to my bill, This continues to happen for months. Everytime I called, they tell me it is resolved but then lie how they want me as a customer and yes me to death with saying they will take care of everything BUT they just lie to get me off the phone and then nothing happens. This is the worst phone service place to go to, I would not recommend T Mobile. Service Value Shipping Returns QualityMy problem with T-Mobile is they Suck. I waited at their store for help 3 times but the wait is so long you have to go an attend your other appointments. I've called 3 times and have waited over 45 for a customer service agent. All this waiting, just to pay my bill. Obviously now is a late payment. Don't let me start on the service on a brand new IPhone.! I wouldn't recommend this company and as soon as I finish paying my phone I'm switching to AT&T.Fraudulent charges on our acct. We've been fighting a phone that was billed to us for two years. Finally switched providers and now they won't unlock one of our phones that's paid off. All over seas customer service. They repeat themselves over and over. You can never track down anyone you've already talked to. Minimum time on a call is an hour to try and fix an issue, then no issues are fixed. It's awful. Just don't do it.I have been a T-Mobile customer for over 10 years, but my experience has been far from satisfactory. Living in a densely populated area, I expected reliable cell coverage. However, T-Mobile's service was so inadequate that they had to provide an amplifier to boost the signal. It was one (two, actually) more devices running in our house, but it solved the issue. Fast forward to when I decided to cancel my service due to moving abroad. To my astonishment, T-Mobile charged me $300 for the amplifier they provided 8 years ago - a piece of equipment that is practically obsolete and that they sold to customers for only $100 back in 2019. That's after I spent $12,000+ with them over the years! Attempting to resolve this issue, I spent several hours with their customer service. While the representatives were friendly, it felt like they weren't really listening (I had to repeat some basic facts several times). They never truly addressed my concerns. Needless to say that I'll never be a customer again. Products used:cell phone service and booster Service Value Returns QualityMy account was overcharged by approx $30 a month for 10 months. T mobile gave me a paltry $30 refund. Spoke to customer service today (Jennifer). Who talked over me the whole time and did not address my real issue. After 5 loyal years I'm switching to consumer cellular. They didn't care when I told them that.I had been a Sprint customer for 10 years, oh and by the way work in Big Tech. Once my account changed from Sprint to TM, I could not pay my bill online, because I couldn't get their stupid code text messaged to me on their Sprint/TMobile Phone. Five months in a row I spent 2 hours a month to fix it SO I COULD GIVE THEM MONEY and they can't figure out technology for the Web or the phone. Don't waste your time, life is too short to put in that much effort to give them money. Products used:Cellular Service Service Value QualityI was a Sprint customer for many years and happy. In 2020, they merged with T-Mobil and I have had nothing but problems. Terrible service, cell and customer. I have a ongoing 6 month issue that they have used every loophole possible to get out of insurance replacement 2 phones now and terrible service. It will now go to small claims court to resolve.It seemed to me impossible to get information and help from anyone. Pushed from person to person with nothing ever resolved. Products used:Iphone 11 Service Value Returns QualityDon't trust T Mobile when they tell you your bill is a certain amount! I have been paying other fees as if paying for my bill and someone elses. I am usually charged a extra 30 to 60 dollars a month without stating what the extra charges are for. Also do not fall for their "Free" phone plan! When you add up the extra payments on their phone from providing your own phone... you can buy 4 of the same phones with their extra charges. Don't get suckered into that scheme! I am done with them and switching companies. Update: I returned everything back over to T mobile. Instead of billing me where I canceled my service with them, they are sending my bill to collections as a act of revenge where they was going to charge me a 70 dollar hidden fee outside my billing cycle and charge it again added to my bill which would have been 200 dollars. NO 5G internet and cellphone service anywhere cost 270.00 dollars a month. Also I found out T Mobile are also a Banking Institution like USAA insurance. Any company that offers dual service tied to a bank will steal money from you any way they can. I am now with Verizon, same service and a whole lot cheaper! Tip for consumers:Beware! T Mobile is also a Banking Institution Products used:T Mobile 5G Cellphone and Internet Service Service QualityI have been having so many problems with their technicians, and even managers don't have a clue of what they are doing. They are always making excuses, when they can't solve problems they ask for additional time and promise to call you back and they never do. Too much false promises, lying, and they are unable to figure out what issues are going on and how to resole them. Very poor and nerve wracking service. Lack of knowledge.A rep said they don't have same "courtesies" as Sprint and the bill is now considerably higher since the merge, which we were not informed about ahead of time. Customer service sucks in comparison to what Sprint had. Rarely have even one bar in major cities like San Francisco and Los Angeles. Service on apps is very slow. It's been terrible Tip for consumers:They do not have the same discounts or rates as sprint, service has gone down hill and billing cost way up. Products used:Phone service, iPhone and Android purchased under sprint before the unfortunate merge of Tmobile Service Value QualityMy brother has been diagnosed with dementia and can't recall his PIN number. As his POA, I am not allowed to have access to his account without his pin. I tried to move to another carrier for him, and T-Mobile has his account locked even tho his phone is paid off and he owes no money for his account. They have the most unreasonable guidelines I have ever seen. I have never seen anyone like them in my life!Very poor service in Cisco Illinois. We keep calling them complaining but no better. I like tmoble but it's not a good choice for my areaThis has to be the worse customer service of all cell phone providers. Every mistake made by the unknowledgeable customer service representative is pushed back on the customer financially. In this day and age where companies are going out of business left and right one would think this company would provide a decent service/product. Can't wait for them to stand in the unemployment line! I would not recommend t mobile under any circumstances! Service Value Shipping Returns QualityWe transferred from another company and we came to upgrade our phones, and do a trade in. They said my old phone was in perfect condition and promised 400 for it. When I came to collect the promised, they said it was apart of their "promotion" so I wont be getting any money. I could have gotten the promotion without giving up my other phone so I was basically scammed. When i tried getting help no one ever reached back to me about this matter. Service Value Shipping Returns QualityThis is the way they roll. I set up a payment arrangement... They told me to come in and make a payment and they would set up an arrangement for the balance. While I am standing in line the next day to pay it like we had discussed on the phone the previous day they turn my phone off. Literally while I am inside of T-Mobile making a payment. And I had to pay a $20 restoration fee for them turning it off while I was in line to make a payment. Absolutely hate T-Mobile. I can't even express enough how much I hate themFrom 3-4 bars, to zero bars, once for 24 hrs+ and once for 12 hours during the day, with TMobile LTE service in the Austin area (*******). No warning either; three calls to customer service yielded no information on why, or when service would be restored. CS does not have access to the field repair activities. The CS members are always nice, friendly, but clueless, kept in the dark by TMobile's bare bones back office infrastructure. Losing customer data, no backups for towers, long down time. It's time to move on.