Stuck with “Invalid IMEI,” “Null IMEI,” or “No Service” on your SC7715 device? You are not alone. The Spreadtrum (now Unisoc) SC7715 is a common chipset in budget 4G feature phones and M2M modules. If the firmware crashes or you flash the wrong ROM, the IMEI (your phone’s unique ID) gets wiped.
Stuck with “Invalid IMEI,” “Null IMEI,” or “No Service” on your SC7715 device? You are not alone. The Spreadtrum (now Unisoc) SC7715 is a common chipset in budget 4G feature phones and M2M modules. If the firmware crashes or you flash the wrong ROM, the IMEI (your phone’s unique ID) gets wiped.