Hi well I have the i337m it was for Telcel Mexico the baseband is i337MUMUEMK6, but i'm using it on AT&T, I'm running Phoenix Rom V9.4
but on reboots it takes quite a while to register properly on the network, however once registered is rock solid with Cell Signal and LTE. So I want to know if I need to change the modem and if so, which one.
When I was using Google edition 4.4.2 by Danvdh
the delay was less than the one i'm experiencing now.