Q: My iphone5s won't send or receive picture messages through wifi only through cellular data. Please help

Hello Hotjojo70,

Thanks for using Apple Support Communities.

Below are the requirements to send and receive MMS.  Wi-Fi only does not support the sending of MMS, as it requires a cellular data connection.

If you can't send and receive MMS

You will need these to send and receive MMS:

• An iPhone 3G or later
• iOS 3.1 or later
• A cellular data connection (MMS isn't available if you're using only Wi-Fi)
• A domestic MMS plan from your cellular provider. You might need an international messaging plan to send MMS to an international contact (Contact your carrier for more information.)
• A roaming MMS when using a cellular provider's network that is different from your billing cellular provider's network (Learn more about roaming and contact your carrier for more information.)

iOS: Troubleshooting Messages

http://support.apple.com/kb/TS2755

Take care,

Alex H.