Are you getting 4G, LTE or 5G icons st the top of your screen?. For example on my device only gets H+ and 3G. I believe that is has something to do with the hardware or modem.
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Hey, did You solve this issue?. I'm having the same problem. My phone is not getting full network reception. I managed to flash the modem.img but just getting H+ connection.
Enviado desde mi 2312CRAD3C mediante Tapatalk