[Android Central Question]

I would connect to Wi-Fi and it would disconnect ten seconds later

[B. Diddy]

Welcome to Android Central! Which phone? Does this only happen on your home network, or on any network?

[Nickanator892]

Samsung Galaxy s6 edge

[B. Diddy]

How about the other question -- does it only happen on your home network, or on any network?

In the meantime, see if it happens in Safe Mode (How do I use Safe Mode on my Galaxy S6 or S6 edge? | Samsung Support UK) or after a cache partition wipe (https://support.t-mobile.com/docs/DOC-29236).

[Nickanator892]

It does it on any network

[Nickanator892]

I also put my phone into safe mode

[B. Diddy]

It might be a firmware or hardware problem. You could try reinstalling the firmware using Smart Switch: http://www.sammobile.com/forum/showthread.php?t=29914. I believe that acts as a factory reset, though, so make sure you back up your data.

[Nickanator892]

I don't have any computers

[Nickanator892]

And safe mode didn't work

[B. Diddy]

Sorry, but I'm afraid I don't have any other ideas. You could bring the phone to a repair shop (or your local Best Buy's Samsung Experience, if you're in the US) and ask them if they can reflash the firmware. If that doesn't work, then it's probably a hardware problem.