HP support and additional resource information. HP designs reliably powerful computing solutions on its high-end products, all HP products carry a unique identification number called a serial number. A serial number is needed to speak with support, to service the product, or to determine if the product is still under warranty. If you're looking for HP products, HP services, or HP support, Call our HP Support Experts for any issues related to HP Products in no waiting time. To reach us dial HP Technical Support Service Number 18888279060.