I transferred all of my data to my new Samsung A20. When I try to make a call or text it says Not registered on Network.
Best answer by tmo_ian
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Userlevel 7
+15
Did you put your SIM card in it? Is your SIM inserted the correct way? Is your SIM activated?
Userlevel 2
+10
We're you able to try syaoran's suggestions? We also have some additional steps to try here: Signal issues / no service troubleshooting | T-Mobile Support
This is also happening to me, and, I also randomly receive the "server unreachable" error. I have brought it back to TMobile several times and they have replaced the SIM card...STILL...nobody knows how to fix this. I had a ZTE that worked perfectly...this Samsung is a piece of garbage...
I had the exact issue, with the same phone. I now have a Samsung A20 too. TMo technician had me change the mobile network to work better with the tower in my area. The tower is LTE/3G and 4G. I needed to change my settings on phone to be LTE/3G. What I had previously was LTE/2G/3G. My tower is heavily trafficked and needed to be able to communicate better with my phone.
Again….change your mobile network on your settings to agree with your tower, most likely LTE/3G.
Call a Tmo tech - not a rep - but a technician if you need help doing this.
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