So check that did you tick "Use only 2G to save battery" option in mobile network setting.
Sent from my G610-U00 using xda app-developers app
Huawei Ascend G610S (G610-U00) with S4 ROM
LG Optimus L70 (LG MS323) with Stock Rom
Samsung Galaxy Grand 2 (SM-G7102) with Stock Rom
Samsung Galaxy SIII AT&T (SGH-I747) with Aroma Premium Suite
Sony Xperia Z Ultra (C6833); Downgraded from 4.4.4 to 4.3 cuz Kitkat sucks.