Unhappy [HELP] CH Play and some app can't connect internet on 3G

help me solve this trouble, Ch play and some apps can't connect to internet when i use 3G, all is ok on wifi
For example: Default browser can't not connect although Chrome connect ok
I tried factory reset but still have problem
Sb show me delete hosts file in system/etc, but my device hasn't been rooted (not avaiable in this time). What i can do?

Asus fonepad fe170cg

My English not good, sorry if it wrong
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