HELP!! I should automatically connect to wi-fi, it Wont! when i tell it to.... it only stays conected for a few seconds.

Hi my iphone suddenly doesn't want to connect automatically to wifi!

Even When I tell it to....

It only stays connect for a few seconds.

You return to wifi to find its turned off.

The process starts again & Again & Again.

With no success!

Works fine on cellular data. I'm trying to update files that require you to connect to wi-fi,

Because some Files are to big to update/upgrade using cellular dara?cellular!

Has anyone else had this problem & worked out how to fix it.

Please please please, help me!

Remaining employed depends on it!! Thanks