Sanyo M1

I may not be much help, but I'll give you my opinion. I don't do much text messaging so I can't tell you the limit of the number of text messages but the number of phone calls in/out retained exceeds ten. As I understand it (haven't tried it) SMS messaging through Sprint lets you send to a large group of recipients. Sprint also provides an extra cost service to automatically backup your contacts or you can use a third party software package to sync to your PC. Your biggest problem is going to be with the keyboard. If I were doing much text messaging, I wouldn't even consider anything without a full keyboard. Maybe I'm just a slow typist ... or too long winded.