Im currently using hotlink for my online mobile gaming however it keeps disconnected around 30 minutes everytime and i thought it was a game's fault.

Not until recently it was an update from google playstore and it keep stopped at certain percentage.

So, I
Tried to download 3 100MB files, all stopped when it reach 30MB.
Tried changing phone, same result.
Tried using other carrier (umobile), no problem.

What's the problem actually?
How can I fix it?