No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
Supposedly it is possible to move limits around with Citi, but I have never had any luck doing it. I have always just ended up cancelling the card.
Typically they require a HP to move limits, and it's usually a hassle to get someone at Citi who even knows it's possible. Totally hit or miss. But it depends if it's worth a HP or not to you.