I currently carry 2 phones with me but rather use 2 sim cards in 1 phone. There used to be a phone years ago that would actually allow that with both numbers working but I don't think any manufacturer still has one. I have 2 questions

a) is there maybe still a phone out that allows 2 sim cards operating ?

b) if not did anybody try the 2 cards in one slot in the same phone ? I understand that only 1 card will work at one time and you either have to reboot or select the card via a menu option. I saw them on ebay and other places but they look kind of cheap to me. Do they work well ?

Thanks for all replies