iPhone 5s water damage, no service but network list

Hi friends,
got a water damaged iPhone 5s All is working but i can’t connect to the network.It just says "searching" "no service". Im able to browse the network list.
Its not time, date related, have imei e.g….
BB got hot, but after cleaning with ultrasonic cleaner all seems to be fine.
PP_BATT_VCC_CONN from U58_RF was corroded.
I scraped down to PP_batt and repaired the track. no short…

Since I can browse the network list, I guess the device is able to receive signals, but can’t transmit??
Anyone here who can help me with this???