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Question Verizon s21 ultra on visible?

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Senior Member
Jun 6, 2013
I bought a Verizon s21 ultra because it was cheaper. It wouldn't activate on visible so I got it unlocked and flashed the unlocked firmware as well. Not I can get it to connect to visible but the LTE works but not great. Something seems a bit off. Can only get it on visible with manually entered APN's. Any advice on what could be causing the slower LTE? Also the phone seems a little slow since the firmware flash.