Wifi problem with the connection of The New Ipad (4G)

I just bough the new ipad ( 2 weeks ago), when i'm at home i usually use wifi connection and it goes w\o problem.
But today after the battery empty, i rechard it like i do,
and while recharing it i tried to update my skype and line apps so i notice this my update went slowly than it usually takes
(it took 20 - 30 mins for one update to be done). I thought
it was because of my internet, so i checked it with my pc but with the pc the internet goes without the problem.
I check other apps again (like youtube, facebook and such..) but everything same so slowly but it has connection.
but with Line it said "please make sure you have internet connection"

so is there anybody who has the same trouble? or any solutions?

thanks lot and sorry bad grammar