For **HP printer customer service**, you can contact HP through these main channels:

– **Technical support (24/7):** Call 800-474-6836 for printer and technical assistance[2].
– **Sales and ordering support for home customers:** Call 888-999-4747, available 7 days a week from 9am to 12am EST[1][3].
– **Business customers sales:** Call 866-625-0242, Monday to Friday from 8am to 8:30pm EST[1].
– **Online support and chat:** HP provides live chat support during the same hours as phone sales[1][3].
– **Printer setup and support resources:** Visit HP’s official support website (e.g., 123.hp.com) for drivers, setup help, and Instant Ink support[5].
– **Warranty checks and order support:** Log in to your HP account or use order number/email/phone for managing orders and returns on HP’s store/contact site[3].

If you are in India, HP customer care can be reached at 1800-258-7170 and sales at 1800-108-4747 with live chat available weekdays during business hours[4].

For assistance related specifically to HP printers, Instant Ink, technical issues, or product registration, contacting these phone numbers or using online chat is the recommended and official method[1][2][3][5].