Let's make sure your wife can send picture messages as well as text. I can help.
Please ensure the setting to enable MMS (Picture) Messaging is set to "ON" on your wife's iPhone 4.
Let me know if this works out for her.
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White iphone 4s not sending mms solution!
I have a white iphone 4s 16 gig (verizon and non jailbroken) and was having same issue of not being able to send MMS, tried all solutions (data on, reset, *228, blah blah) with no sucess... I then went through recently dowloaded apps, and deleted Onavo Extend (data compressing app-similar to opera mini) after uninstalling, my iphone started sending MMS...also got a s**tload of pictures from multiple contacts from like the two weeks it wasn't working all at once. I"m not sure what the correlation is, but maybe data compressing or data altering apps have some effect on MMS. All i know is it solved the issue for me, and havnt had a problem since, just trying to help out others that have this extremely frustrating problem! Anyone please reply if this works for you as i'm still curious if this was just my device or if it will work for everyone. Goodluck!!
I can vouch for what ^ billtep ^ ! This is completely true! After trying to send pics ALL DAY LONG (sorry to those who have been waiting to fix this longer), deleting the app Onavo Extend, removing it from your profile in settings (i don't remember where in here, just look), and then restarting your phone, sending pics should work! This issue was seriously frustrating me and a Verizon rep thought this was a hardware issue and even suggested that I return the iphone to get a new one. I was gonna do this but I am glad I didn't and I kept searching and found billtep's post! Thanks billtep!
Try this process everyone!