I found this to be interesting. We have talked about how you can not combine or convert between the citibank platinum select and the AT&T Universal cards even though they are both Citibank, but I had something iteresting happen. My fiance has an Universal Card with an 8k limit, and a platinum select with a 22.7k limit. He received a preapproval for another Universal Card. Not knowing if he could have 2 Universal Cards, we took a chance and he applied for it. First he was turned down because they would not give him any additional credit - they said he had a sufficient amount with Citibank. Then he received a letter offering to split his platinum select limit with a new Universal card. Now it didn't state it was his platinum select they were referring to, but it referred to his 22.7k limit. So I ask you, If they can split the limit between Platinum Select and Universal Card, why can't they combine or convert between the two?