Sending SMS to multiple contacts

try going into Settings. Under Applications, select Messaging, and make sure Group Text is on.
 
do any of the people in your group message that are failing have an iphone? if so, it's been said in another thread on here that imessage messes up the group messaging in wp8.
 
Turn off WiFi and make sure data is on
Sent from my Nokia Lumia 920 using Board Express
 
Do you have the MMS option on, if so you may need credit to do the MMS and of course the right settings for the MMS to send. Try turning it off if it's on.
 
I have the same exact problem and for some reason now I am able to send when I turned facebook chat on. BUT, the recipient recieves my sms as mms and cannot read the message right away, they have to go to a link and it was labeled as multimedia on their phone. Is there a way to fix this? please help us...
 
for some reason, text messages to multiple recipients is sent as MMS. if you do not have MMS enabled by your operator or not have the configuration set then it would likely fail.