Hey :) So I have a Samsung SGH-U900 soul phone, and for some reason, with one of my friends, I can't send them a message unless I am replying to one of their messages. Like, for example, I've texted out a message, set this friend as the recipient for him to receive my message, I select 'send', it says 'Sending...', and then a few seconds later, 'Sending message failed'. But if I've got a message from him, and I reply to it, and send it, it actually works. Do any of you have any idea what's going on...? Is it something to do with his phone? Or my phone not wanting to send to a certain person? Or...? Thank you very much! :)