How to say in Czech: Do we know his mobile number?

English
Do know
Czech
Známe jeho mobilní číslo?
What is his telephone number?
We do not know his mobile number.
We know his mobile number.
Did we forget his mobile number?
Do we have his mobile number?
Do we need his mobile number?
Do we want his mobile number?
We do not have his mobile number.
We do not need his mobile number.
We forgot his mobile number.

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