Default LG G3 sending MMS

Hello,

I notice that my LG G3 sending mms on 1925353 number....
So, i root my phone, i installed xposed and xprivacy. I blocked all mms app permission and ... no result. MMS continue to be send...
So i unroot with SuperSu, Reset my phone (with Android kitkat option no wipe) and reinstall all the app and, ..., MMS continue to be send.
I checked my G3 with avast, no virus...
I suspect the LG app or processus??
An idea?

Thanks!