I - Phone FAIL

Conversation with my friend mike soon after he bought an i - phone

Mike: Sip son

Rusty: sip son?

Mike: Sip

Mike: Sup

Mike: A

Rusty: i phone fail

Mike: Damn spell check

[I'm still not sure what the "A" is for? I mean the argument was between "i" and "u" for sip or sup].