Hello SallyandBrenton,
Welcome to the community!
Are you referring to mobile or cellular services and a phone SIM card? Or are you possibly referring to a pet microchip? If it's the latter, you should know this forum deals with mobile phone services from Fido Solutions (Fido.ca). You would need to contact the appropriate company responsible for monitoring the microchips.
On the other hand, if you are referring to a cellular phone line, and you would like your grandmother to take over that line, that would be a Transfer of Responsibility (TOR) of the line. You should note that she would need to open her own account at the time of transfer and that a credit evaluation would likely be needed. In addition, it should be noted that there would be a fee for the transfer (see here).
You should note that the forums are community-driven and not intended as a venue for customer services. You would first need to contact customer service and notify them of your intent to transfer the responsibility of your line. Your grandmother would also need to contact customer service and notify them of her intent to take responsibility for the line and open the account. You would then need to contact them to complete the transfer.
Hope this helps 😀
Cheers
