one of the sim is active and other is inactive

[Android Central Question]

am using umidigi z2 pro. and using flash tool i changed rom using format + download. after finsihing setup . indicating "unactive" in right hand corner in red color and also one sim is active anther one doesnt show antenna sign.
some one help me with this problem.

 

[Rukbat]

Umidigi is dual-standby - only 1 SIM works at a time.