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!!