Are you on pay as you go or pay monthly?
If pay as you go, you will need credit to send a picture message.
If contract, they will be an extra charge and if you have a £0 spend cap on your account you will not be able to send them.
An alternative (and cheaper) is to use WhatsApp or Facebook Messenger to send them.
Can you use mobile data ok?
Check your APN settings (the ones that tell your phone how to connect to the network) - see link below.
https://lowdown.carphonewarehouse.com/how-to/o2-apn-settings/40702/
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
