The EFS partition (storing IMEI and Wi-Fi MAC addresses) is intimately linked to the cert file. If your EFS is corrupted and you lose cellular signal, restoring a backup of the sometimes rebuilds the link between the modem and the system.

Look for the reference in:

If you plan to install LineageOS or a custom ROM on your Grand Prime, you must understand that . This is why many users fail.

A: Absolutely not. Deleting the cert file will hard-brick your phone (no download mode, no recovery). Carrier unlock requires a network code or software unlock, not cert file deletion.

openssl x509 -in g532g.crt -text -noout

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