ZF Model: ZE554KLRAM: 4GFirmware/APP Version: ww_ze554kl_15.0610.1901.22Frequency of Occurrence: alwaysRooted: NoAPP Name: I have a problem since i updated to last firmware ww_ze554kl_15.0610.1901.22 .
My connection drops from 4G to 3G or H+ in a 4G ...
