Tamper with your IMEI using an incompatible IMEI changer.Flash a custom ROM or not fully incompatible stock rom / firmware.Format the phone using SP Flash tool or a Chinese box e.g Miracle Box, Volcano Box, Infinity Chinese Miracle II box etc.The primary cause is the wiping / corruption of the Secro and NVRAM (or NVDATA) partition(s). What causes Unknown Baseband / IMEI and issues detecting SIM Cards or Network signal on a Mediatek phone? This is because your Baseband, IMEI, WiFi & Bluetooth addresses are important for radio communication. A null IMEI or unknown Baseband could make your Mediatek phone unable to detect SIM Card(s), network signals (Emergency Mode), make calls or dial short codes (to check your account balance etc). This guide will explain how to fix Unknown Baseband, NULL or Invalid IMEI & SIM / Network not detected on Mediatek (MTK) devices.
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