I have an iPhone 4 and so does my daughter. I have a data block on her phone but I would like to be able to text her when she is out. She can send me texts but mine don't go through to her, her friend has an iPhone and they were texting back and forth today, why can't my phone text her?
Its most likely something to do with imessage since you mention a data block. In your settings turn imessage off so you will now send as sms. Also keep in mind your daughter won't be able to use mms with a data block on. EDIT: ohhh so she receives some messages. I think Brian is correct is it only pic messages that she is not receiving?