HP does offer 24/7 live tech support, but it may vary depending on your region or product. For U.S. customers, the general tech support phone number is +1 (254) 268-8149. This line is available 24/7 for hardware and software issues. You can also visit the HP Support website for live chat or to schedule a callback. Be sure to have your product details handy for faster service. https://comfix365.com/blog/hp-printer-support-phone-number