So I haven't had any picture messages failed to send while sending to a non iPhone user but tonight for the first time I experienced it. I was connected to wifi at my house like always and wanted to send a pic to my friend who has a windows phone and it kept saying failure to send message. It always sends fast if it's an iPhone or not. Turned off my phone turned it back on and it sent no problem. But when I turned my phone back on I Turned the wifi off and it sent on LTE after turning my phone back on. Any thoughts? Thanks
