I have the same issue with new iPhone 13.  I have switched to 4g and back with no change.  Shouldn't have to be manipulating settings to be able to get service when the phone is showing good network service.  I did connect after shutting down the phone and powering it back up.  But again I shouldn't have to jump through hoops to have my brand new phone work.  New to T-mobile and I am wondering if I made a mistake changing carriers.

T-MOBILE is a disgrace. Had good 4G service on Sprint with a tower (ONI ID:WA54XC793) ½ a mile from my office and residence. Forced to re-sim and then they shut down the tower, service went to hell. Have to reset all equipment several times a day just to stay connected. Was promised in late July old tower would be re-provisioned by end of August. Just more lies!

Probably listed in terms of service as agreeing not to sue but a class action lawsuit is in order Not sure if TOS will trump knowingly offering for $$$ a service they "know or should have known" are not able to deliver. At stake is public safety most importantly not knowing if you can contact 911 if needed. Regardless a complaint to the State Corporation Commission is in order.

If you live in Virginia search “Communications Company Complaint Form”

@scc.virginia.gov

I have many instances when I have 5 bars of 5G and the mobile hotspot won't work on my phone. The computer I'm trying to connect to my phone says "No Internet connection.". I also have issue with 4 bars of either LTE or 5G and I can't get any internet on my phone. I switched from Verizon because T-Mobile said that the greatly increased their coverage and their 5 G network. It must only be in theory because I have had these issues often since switching in May. I don't believe it's the phone or that you're in a basement or any of the other responses that make the issue the user's issue. It's T-Mobile 's issue and they need to fix it! 

Cali Cat wrote:

It looks like most of the folks having this issue (phone and/or home internet) are describing when the cell towers are overloaded with more connections then it can manage. The symptoms are:

• Strong signal but low or no data
• Strong signal but dropped calls
• Restarting your device gives you a brief moment when data works again only to lose it. This is caused by your restart putting your device back to top of the data queue momentarily.

I experience this a lot in both dense cities and remote areas. A good example is a vacation spot. Go during the week and no problems. Go during the weekends and your same phone from the same spot gets little to no data even though the signal strengths is the same as the week.

Unfortunately, the "fix" is for TMO to upgrade such towers and they are. However, they can only upgrade so many on a given day and nobody can tell you when your area will be upgraded. TMO want's to add more capacity so they can bring in more customers. I'm sure the TMO exec is accurately aware that continued overloading will drive customers to other carriers.

Found the same symptoms through trial and error in an ex-urban / rural area (including vacation in a dense city last week) .  My wife's older phone works flawlessly on 4G (LTE?), but my newer phone on 5G cannot make or receive calls reliably 5 minutes after a reboot.  I have to switch phone settings back to where I am on an Edge tower to reliably make and receive phone calls.  

Thank you for the explanation.  The "Largest 5G Network" is not quite rolled out to my neck of the woods.  Wish my phone and/ or the towers would auto negotiate down so I could do normal stuff I've expected to "just work" for the last 8 years.

Cali Cat wrote:

It looks like most of the folks having this issue (phone and/or home internet) are describing when the cell towers are overloaded with more connections then it can manage. The symptoms are:

• Strong signal but low or no data
• Strong signal but dropped calls
• Restarting your device gives you a brief moment when data works again only to lose it. This is caused by your restart putting your device back to top of the data queue momentarily.

I experience this a lot in both dense cities and remote areas. A good example is a vacation spot. Go during the week and no problems. Go during the weekends and your same phone from the same spot gets little to no data even though the signal strengths is the same as the week.

Unfortunately, the "fix" is for TMO to upgrade such towers and they are. However, they can only upgrade so many on a given day and nobody can tell you when your area will be upgraded. TMO want's to add more capacity so they can bring in more customers. I'm sure the TMO exec is accurately aware that continued overloading will drive customers to other carriers.

First explanation I have received that makes some sense to me.  They grew too fast. 

I am having the same issue in SD.  All members of my family have an iPhone 12 and all of us show 4 bars on the 5G network but we constantly are loosing connections with Apple Music, Maps, Podcasts, texting, to name just a few.  I have been sent new SIM cards from T-Mobile that were suppose to fix the issue and it did nothing.  I have tried switching to LTE but we have the same issue with LTE.  I am not even getting 1.0 Mbps upload speeds.  I wanted to love T-Mobile because the monthly charges were so much lower but I am going to be forced to switch back to Verizon because our phones are not even usable with T-Mobile.  Unfortunately,  all phones are locked until we pay out our obligation, which makes no sense since two of the phones were suppose to be free.   If T-Mobile cannot fulfil their obligation to provide service why am I obligated to payout my contract?  Frustrate in SD where the map shows 5G Ultra in the urban area I live in, but extremely slow speeds.

It looks like most of the folks having this issue (phone and/or home internet) are describing when the cell towers are overloaded with more connections then it can manage. The symptoms are:

• Strong signal but low or no data
• Strong signal but dropped calls
• Restarting your device gives you a brief moment when data works again only to lose it. This is caused by your restart putting your device back to top of the data queue momentarily.

I experience this a lot in both dense cities and remote areas. A good example is a vacation spot. Go during the week and no problems. Go during the weekends and your same phone from the same spot gets little to no data even though the signal strengths is the same as the week.

Unfortunately, the "fix" is for TMO to upgrade such towers and they are. However, they can only upgrade so many on a given day and nobody can tell you when your area will be upgraded. TMO want's to add more capacity so they can bring in more customers. I'm sure the TMO exec is accurately aware that continued overloading will drive customers to other carriers.

Yeah I'm done. Took my 6 lines to Verizon. Oh well, I tried T-Mobile. You broke my heart lol.

S21 Ultra same issue. Terribly frustrating, and it appears to only happen around my workplace so it appears to be location specific. Some days it works, most the time it does not. Unfortunately nothing to add to help, but this needs to be addressed.

Same problem with Samsung Galaxy S20+ 5G. Switching to LTE does not always help. Use phone for business, and losing data service is costing me money! Have contacted T-Mobile support multiple times since December of 2021, and they do nothing. They seem to be reading from a book when they give you their response, and I don't think they really have anyone out there in the field who checks on whether the service actually works. Very close to changing carriers, as I cannot continue to lose money.