[rixed]

I don't know if it is still the case, but in the past Android would let you create several user accounts on a single phone.

[Y_Y]

To be completely fair, Android also allows having multiple sims and phone numbers on a single phone. I've never heard of people sharing a device without sharing the number, but it's possible.

[david_allison]

It's still the case. I have at least 4 on the same number.