iPhone Any tweaks that interfere with iMessage?

My iMessage hasn't been working on one particular wifi network (my schools wifi) for the past two days. It works fine at my house over wifi and fine on LTE.

I have T-Mobile and thought maybe wifi calling could be interfering but I haven't found that to be the case. I've tried lots of things to no avail, and now I'm wondering if any tweaks can cause problems..

Tweaks:
Activator
Ad blocker
Alkaline
Browser changer
Cc settings
Chrome downloader plus
Eclipse 2
Forcegoodfit
Hideme8
Icon renamer
Infinidock
Kill background8
Nottracking plus
Phantom
Powertap
Statusvol
Virtual home
Winter board

Any helps appreciated!!

Andydigital said:

Your school is probably blocking the messaging networks on purpose, so that you actually pay attention and learn something rather than txt'in under the desk

Click to expand...

EDIT: I found a solution, which was adding a VPN. I didn't even have to enable it for it to fix my problem, but lo and behold imessage regained function!