Why my phone's mobile data on and off automatically while its on ?

[Android Central Question]

My device is HUAWEI p20 lite.

When i turned on mobile data manually, few times later its turned on and off automatically.
Sometimes i noticed that it will be alright, but when i used the data then it again turned it on and off automatically.

please give me a solution fix this problem.

 

[B. Diddy]

Welcome to Android Central! Does that actually interfere with your routine usage, or is it only turning off when the phone is idle?