Can you not receive, or send.? What are your settings for data?
Did u follow those instructions ? Did u try clearing the apps cache?
Done it all, man. I got one message after I flashed yesterday but nothing since. Never been able to send.
EDIT: So I went thru these steps again except this time I did it about 3 times to the point that data wouldn't come back and I couldn't get over 1 bar of service. The only thing I did differently this time is after the 3rd time, I switched network to lte/cdma only vs default (lte/cdma/gsm/evdo/wcdma.) After I switched back to default (lte/cdma/gsm/evdo/wcdma) again and toggled airplane, I rebooted and cleared cache. Now it's all working. No idea how or why this doesn't work first time.. it sounds like one of those things that you'll have to keep playing with until it works?..
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