Yes - we call that NumberShare.

You may pair your Cellular Apple Watch (Series 3 and above) or Samsung Galaxy Watch (Watch 3 & Active 2) by sending an e-mail to customercare@apelainc.com or by calling 248.817.1621 and provide us with the IMEI and EID numbers of your Watch.

NumberShare is billed at $13/mo per line + any applicable taxes and fees.