Pretending to be a survey, but not saying who or what for, asking for age and gender via number pad.

Caller: Spam

Called twice but didn’t leave a message

Called after 6pm, answered call but no sound.

Missed the call, came up saying suspected spam. Tried to call back but the number doesn't even connect (it's like it gets stuck trying to call, but doesn't actually fail or give any generic message) weirdest thing I've seen for one of these types of things