What does QSM? stand for?

QSM? stands for "Shall I repeat the last message which I sent you?"

How to abbreviate "Shall I repeat the last message which I sent you?"?

"Shall I repeat the last message which I sent you?" can be abbreviated as QSM?

What is the meaning of QSM? abbreviation?

The meaning of QSM? abbreviation is "Shall I repeat the last message which I sent you?"

What does QSM? mean?

QSM? as abbreviation means "Shall I repeat the last message which I sent you?"