T-Mobile - Google Messages - RCS issue

How old is your sim ?

Well it's the sim from my iphone 12 that I was using before the S21...so it's about what five months or so months old. And I told the tech support guy that I took my iphone sim out of that and put it in my S21 Ultra the day I got it. He said that shouldn't really matter since they are both 5G and it's a 5G sim card. And I guess when you put your sim in a new phone it will automatically register with their network and switch everything that needs switching...I don't know much about any of that but that's what this guy said....I'll take that with a grain of salt.lol
 
Well it's the sim from my iphone 12 that I was using before the S21...so it's about what five months or so months old. And I told the tech support guy that I took my iphone sim out of that and put it in my S21 Ultra the day I got it. He said that shouldn't really matter since they are both 5G and it's a 5G sim card. And I guess when you put your sim in a new phone it will automatically register with their network and switch everything that needs switching...I don't know much about any of that but that's what this guy said....I'll take that with a grain of salt.lol
Yeah shouldn't be a issue , I've done that plenty of times between my andriod and iPhones
 
Tried resetting network settings twice. As far as me, I am using the new sim that was in box with phone.
It's so weird , I have 2 numbers one from att and other tmobile and I had switched them recently on my Note 20u and both get verified in Google message app:(((
 
It's strange the way it works.
I have Google Messages RCS working without having the Carrier Services app installed on unlocked S21 using T-mobile.
What does that app do that fixed it?

I honestly don't know lol, I was just glad it fixed it. We're on AT&T, and my wife's Moto G6 set RCS up instantly, when I was originally setting it up for her. Both our phones were purchased new unlocked. Are you sure you don't have the carrier services app on your phone? I've personally never seen an Android smartphone without it.
 
It's so weird , I have 2 numbers one from att and other tmobile and I had switched them recently on my Note 20u and both get verified in Google message app:(((

Yeah I had no problem on Note 20U with t-mobile and 1st 4 days on s21U worked fine.
 
I change devices so often and have zero trouble with RCS in Google messages with S21 Ultra unlocked on TMobile. I never bother with anything Samsung apps (Samsung messages) so don't know if that causes any issues. But just using Google messages RCS on many different devices I generally have no issues.
 
My RCS finally connected today. I have no idea why but I had it off overnight and then tried it today around 1p and sure enough it connected. Maybe when I called VZW tech support yesterday they actually did something to reset it somehow.
 
Speaking of Google messages, did any one ever find the apk for the samsung version of google messages...If you are outside the US and have it, is it much different.. Curious, but might be scared to try since probably would never connect..lol
 

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