Whenever i switch mobile data ON on my Zong SIM, it first switch ON on 4G then move to 3G, even in full 4G coverage. I change sim slots, replace sim but still getting the same.
If i switch on airplane mode then, it go to 4g. And when ever next time i on data it work on 4g for few seconds then agin move to 3g.
Kindly tell what's the reason.. Apn setting is fine, sim replaced, full 4g coverage checked. Software updated to latest. PTA approved officially.
