If a user sees the IMEI Null or Baseband Unknown issue in Alcatel Pop 3 (5.5) 5025 mobile, it is a matter of great concern, because this issue is directly related to the modem partition. Most users consider it a hardware issue, although it is a result of corruption. When you want to rewrite the modem firmware, the secure boot barrier comes in the way. At this point, the modem partition can be re-corrected by loading the DA Auth File using SP Flash Tool or Maui Meta Tool. The DA file validates the system that you are doing an authorized flashing. In this way, the mobile not only starts catching the signal again, but also the original IMEI can be restored..
Alcatel Pop 3 (5.5) 5025 mobiles sometimes encounter a problem called “After Flash Touch Not Working”. This happens when you use the wrong firmware or the touchscreen driver is missing. In such a case, the touch IC is fine, but the system cannot detect it. If you want to install the correct firmware again, you will get a Brom authentication error due to secure boot. To solve this problem, a DA Auth File is used, which temporarily disables secure boot and allows SP Flash Tool to install the new firmware or specific touchscreen driver. Although this process is advanced, if it is successful, the mobile comes back to life in a new way.