T-mobile needs to fix the data issue with Canada

I was having this same issue and was able to resolve it by turning on LTE. On iOS this was in Settings > Cellular > Cellular data options > Voice & data > select LTE. Hope this helps someone. 

I'm getting an alert from Bell asking my to "Sign on to network" every time I try to use the data there. Everything else works fine-- roaming is activated, and I called T-Mobile and nothing worked. My plan should cover data in Canada as well. I'm using a Redmi Note 10 5g.

I am currently in Toronto, Canada and have no issues using 5G on Telus or Bell with my T-Mobile SIM.  Canada only offers 5G in a handful of cities so having 3G and 4G/LTE enabled will help when traveling outside of Canada's 5 largest cities.  

Try scanning for carriers, and ensure that your device has 'Data Roaming' Enabled (not just from the carrier side).  One the east coast, it was 4G LTE / 4G on Bell/Telus.  I couldn't register with Rogers (my AT&T work phone worked on Rogers 5G)

turn your roaming off? do you normally have a connection in that area or has it always been a roaming issue?

molly11777 wrote:

I'm in upstate ny and all I can get is roaming on Canadian cell towers.  Not cool!

During one trip upstate, I ended up with a lot of At&t and Bell roaming over T-Mobile.  Manual network selection can keep you from roaming, but may end up with "No Service" more often

Eriksven wrote:

People spending money for iPhones/Androids/Phone plans don't need to be checking about all kinds of compatibility. We're not phone/data specialists.

 

Roaming was on. Full bars. It works everywhere I've ever been on the planet - except Vancouver area. I'm sorry but the data speeds can't be that typically slow in Canada. You can't even load an app to pay by phone to park on the street. We had to connect to Wi-Fi every time we wanted to park at a meter. Nobody's phone we were with worked.

Some phone apps for parking and city services will not work with international numbers.  This is an app restriction, nothing to do with roaming.  Had this very issue in Richmond, VA when trying to pay for parking through their app at the Richmond Convention Center.  I had my Canadian SIM selected and payment would never go through.  As soon as I switched it to my T-Mobile SIM.  It worked the first time.  Using my T-Mobile SIM in Toronto for Canadian apps also results in similar issues.  It's solely an app restriction and it's common.  Even Little Caesar's won't allow me to order a pizza in Canada if my T-Mobile SIM is selected.  

Sadly as a former metro by T-Mobile and still current customer for phone and WiFi love it not just Canada my iPhone 12 has so many problems I literally can’t use a physical sim at after my original sim had a burned thumb print on it 

I used it last summer - iPhone 12, 2x iPhone 13 and a Samsung S21.  It stayed on LTE (New Brunswick, Nova Scotia, PEI), and have used it for years in BC, Ontario and parts of Quebec.  It was primarily Bell/Telus/Videotron.  It took an act of congress to get Rogers roaming working.

AT&T roams on Rogers LTE/5G quite well.  Service was similar.  Bell/Telus have a bigger footprint in the east.  Rogers still has better in NW Ontario, and service is similar in the West.

I've been having problems with this issue myself. I have a factory unlocked Samsung A716U1. My phone works flawlessly when in the US, but as soon as I cross the border into Canada, I get no signal and cannot call out or text. However, if I'm connected to a wifi network, I turn on Wifi Calling and my phone works as intended. I don't understand it and it's frustrating.