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calls do not enter to the Smartphone

danielmy
Star I
ZF Model: ZC520KL
RAM: 2G
Firmware/APP Version: WW_15.2016.19.01.506
Frequency of Occurrence: 50%
Rooted: No
APP Name:

In many occasions the calls do not enter to the Smartphone, in spite of having all the signal
1 REPLY 1

ServiceE_Asus
Star I
Hi daniel12 , Good day. Have you checked this matter with another different operator SIM card? Please kindly help me disable SIM and enable again. I would also suggest you can update the firmware to the latest WW-15.2016.1903.511 for a check. (settings> system > system update) If this problem still appears, please kindly try to backup phone files and factory reset. Sorry for any inconvenience.