Originally Posted by
fillossofer I know this is an old thread and these are old devices, but what Travo79 says above is exactly correct. The FCC says carriers must leave devices unlocked (or unlock them upon request), so they can be used on any network. I am switching my family to T-Mobile from Verizon and I have three devices that appear to be carrier locked. Yes, the phone works for calls when I put in the T-mobile SIM, but soon after boot I get a "SIM card not from Verizon Wireless message and everything else stops working. I called Verizon and they say that the phones are unlocked, but clearly that is BS, since the message says "SIM card not from Verizon Wireless". Why else would that message appear? This is a violation of federal law. If anyone else is having this issue, please let me know. I have three such devices and I'm not going to use crippled devices, or buy new ones just because Verizon wants to be a ****.
I was a Verizon rep for 4 years, they never locked their devices, and still don't according to their website.(unless it's prepaid) I've also personally ran my S7 on both Verizon and Tmobile swapping SIM cards back and forth while the phone had an active device payment plan.
Now with that said not all Verizon phones are network capable with Tmobile, it's a hardware limitation from different network technology. You're also required to configure the phone for the different network, which Tmobile should have the information needed.