or visit Here link,
and go Changing APN Settings On Android device
click Here link,
Ensure you have the correct APN settings by visit Here link,
Select the brand and model of your phone, After doing so, you will be provided with the exact APNs required for your phone on our network.
for iphone go to Settings > Messages > To turn iMessage on or off,
Turn your data on to send a Picture Messaging in world-wide,
if your data is off and your home internet wifi is on is not going through the Picture or a video Messaging,
you have to do this to is going through you will need to turn your data on to send a Picture or a video Messaging in world-wide,
make sure your Data is on.
orcan you try manually selecting network "3G ONLY" or WCDMA only,
for android visit Here link ,
and do Rebooting your phone