[lekside22]

i have an infinix x551 with an unknown baseband and null imei issue. please i need the fix

[xerxes]

i have an infinix x551 with an unknown baseband and null imei issue. please i need the fix

Regain baseband by downloading secro and scatter file for your device build no. @ https://www.hovatek.com/forum/thread-19977.html . 
Flash using SP Flash tool @ https://www.hovatek.com/forum/thread-159.html

[hovatek]

Once Baseband is regained, you can then fix null IMEI using https://www.hovatek.com/forum/thread-116.html