If you get "Authentication Required" or "BROM Error" with Tecno SA1 Mobile, then there is no need to panic. All these errors indicate the lack of DA file. This file is a bridge of trust between the mobile and the flashing tool that makes the flashing process possible. Understanding the DA file may be difficult for a common user, but for an expert, this file is as important as a key to a lock. For Tecno SA1 Mobile, this file is a tool that can not only restore the old state of the phone but also install new systems easily.
If your Tecno SA1 phone does not receive any signal after flashing, the phone is on but shows no service, then it is possible that the nvdata or modem partition is corrupt. The DA file is necessary to write these sensitive files, otherwise the phone will always remain silent. If an error like "orange state" or "dm-verity corruption" occurs in the Tecno SA1 mobile, then normal flashing will not fix it. The DA file bypasses these errors and temporarily unlocks the secure zone, which allows the entire system to be reinstalled.