Problem:

Two SIM cards of the same carrier are inserted into a dual-SIM 4G phone. The number of 4G signal bars on the two cards is different, or one card displays 4G signals while the other displays 2G or 3G signals.

Cause:

The two SIM cards use different radio frequency resources. The signals of the two SIM cards may be different due to the phone's position, angle, and how you hold your phone.

Solution:

If one SIM card is in the 4G network and the other one is in the 2G/3G network and this situation occurs frequently, back up your data and take your phone and the proof of purchase to an authorized Huawei Customer Service Center for assistance.