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Browse credit cards from a variety of issuers to see if there's a better card for you.
If you are dissatisfied you can contact FIA UW, they are very professional and great to deal with.
Keep in mind just because one lender gave you a $10k CL, doesn't mean another will match. Income, assets, payment history and credit history all play a part in CL allocation.
LOL. To many here, 8100 is a pretty good CL. Congrats