The Samsung A12 uses a Mediatek MT6765 chipset. The modem is inside the main processor. A skilled micro-soldering technician must:
Open your phone dialer and enter . If the screen is blank or displays "Unknown," proceed with the fixes below. Reset Network Settings samsung a12 imei unknown
. This wipes your Wi-Fi and Bluetooth but often fixes cellular handshake issues. samsung.com The Common Hardware Issue (A12 Specific) Factory Reset The Samsung A12 uses a Mediatek MT6765 chipset