Ń jẹ́ kí ń gba nọ́mbà fóò̀ní rẹ̀?
However, this might be considered a bit too direct and formal. A more common and polite way to ask for someone's phone number in Yoruba would be:
Èmi o lè gba nọ́mbà fóò̀ní rẹ̀?
This translates to "May I have your phone number?" and is a more respectful and less demanding way to ask.
You could also use a more casual phrase like:
Nọ́mbà fóò̀ní rẹ̀, a lè gba o?
This translates to "Your phone number, can I have it?" and is a more informal way to ask.
It's important to note that in any of these instances, it's always good to be polite and respectful when asking for someone's phone number.