Recieving Tex Message And Phone Calls In London?

MY Friends Is currently in london I Texed Him 3 times just to make sure he got over there ok.He has't phoned me yet to say anything,But I have My roaming on my phine whichis sprint turned off. Becuse I don't want calls coming in and roaming. to cause my bill to be high. I guess what my question is did he recieve my texes in london or not does he have to pay for them if he texes me back.