I need to be on Wifi Calling only at work (cell signal is non existent) and have seen (and experienced on GSIII) that Hangouts has trouble with MMS and group messaging on wifi only.
Choosing Cell Network preferred on my GSIII does not help because it locks onto a junk signal and just fails the text instead of trying Wifi.
I am worried about the GPE having same issue.
The solutions seems to be stock messaging but is that an option on the GPE ? Will I have to use Textra to do MMS/group messaging ? Will that even work ?
http://johnalvarez.net/?p=2062 seems to have similar issue