Signal sim card hilang

edited September 30 in ZenFone Max Series
ZF Model: ZE554KL
RAM: 1G
Firmware/APP Version: OPM1.WW_phone-15.2016.1811.134-20181130
Frequency of Occurrence: No
Rooted: No
APP Name: Asus Zenfone max m2

Jaringan sim card hilang tapi kadang ada
Sudah downgrade ke Oreo masih juga begitu
Tapi sinyal WiFi normal lancar
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