How are you trying to send pics? via email, via iMessage? Try rebooting your device and then go to Settings>General>Reset and then select "Reset Network Settings".
This is the one drawback with the "ask a question" without being registered, OP can't respond and if its such a vague question we can't really give a good/direct answer. Just my $0.02
we definitely need more info so hopefully they will come back. We definitely need to know how they are trying to send the picture? AirDrop, email, iMessage, etc.