You can apply for a credit card online, by phone, or through a paper application. The online process is usually the fastest, with most issuers giving you an approval decision almost instantly. To apply, you’ll need to provide details such as your date of birth, Social Security number, income, housing expenses, and any authorized users you’d like to add.

While many applications are approved right away, the physical card usually arrives by mail within 3 to 10 business days. Some issuers offer expedited or overnight shipping if you need your card quickly, though this may involve an extra fee.

Lenders determine credit limits by evaluating several factors, with your credit score being the most important. They may also look at your income, employment status, and debt-to-income ratio. Depending on the card, the limit could be a fixed amount or a flexible one that adjusts based on your spending history and creditworthiness.

Yes, in many cases you can. If your account is in good standing—meaning you’ve made on-time payments and haven’t gone over your limit—you can call your card issuer’s customer service team to request a lower interest rate.

If you spot an unauthorized charge or have trouble getting a refund for a purchase, you can file a dispute with your card issuer. This can usually be done online or by calling the number on the back of your card. Your bank will investigate the issue and may issue a temporary credit while the dispute is being reviewed.