Restore factory setting on the menu of the phoneĢ. Unknown baseband most phone in about menu most of the android phoneĪfter writing a Good NVRAM database to the device If this is still "U nknown Baseband", Try the following I made in my experience.ġ. Invalid sim but showing the name of SIM network name Some problem if your phone show issue on-screen display if no IMEI or Invalid If not shown IMEI 15 digit after you type on the dialer, You see on Mobile screen is Invalid IMEI or no IMEI showed, The result is the reading signal of your phone in subscriber is disconnected only emergency call only is only allowed. Or you can see it by type a key on all devices *#06# on call dialer of your phone. IMEI is a 15 digit code that always found indicate on back housing of mobile phone below the name model. The NVRAM item is the small part of the firmware of devices are called modem file.Ī modem file is a software file to support the hardware baseband module to reading SIM carrier to connect and give a signal to a phone by an identity of every phone via a serial number or we called it IMEI.
WHAT IS NVRAM DATABASE in MOBILE PHONE FIRMWARE
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