I have a Note 3 that I bought unlocked on Ebay. It was originally a Verizon phone.
When I went to my local T-Mobile store to get my number ported over, they gave me a SIM card for the phone. My phone notification shows "This SIM card is from an unknown source".
Phone works great except I cannot send or respond to Group Messages, I can't send Pictures, and usually when I am receiving a Group Message or Picture it comes in a separate text with a "download" button that doesn't download anything. Basically, MMS does not work properly.
My local T-Mobile guy exhausted all options to his knowledge and could not fix.
I found a potential online fix for this via T-Mobile support which basically suggests creating a new APN with specific settings. I created a new APN as instructed BUT there are two key APN settings that are locked on my phone and need to be changed. The two field are:
- APN protocol
- APN roaming protocol
Both of these are currently set to IPv4. I need to change them to IPv6.
Does anyone know how I can unlock these fields to change this to IPv6? I'm wondering if the unknown SIM card and Verizon are the reasons these fields are locked.
Thanks for your help.