How do I increase my credit limit on hsbc premier credit card?

I have been using my HSBC Premier card for a while. How do I request a higher credit limit

Contact hsbc customer service or visit your nearest branch or reach to your rm.

HSBC Premier Credit Card limits can be increased through pre-approved offers or manual requests.
To request an increase, you may contact HSBC Customer Care, visit a branch, or email Support.
Documents that are required include salary slips, ITR/Form 16, and bank statements.
Factors for increasing limits include regular bill payments, low credit utilization, higher income, and a good credit score.

manual request i.e by submitting latest salary slip and ITR documents gives higher chances to increase the Credit Limit on HSBC Premier Credit Card