Good evening and welcome to the Community @MrBow,
A new phone sounds exciting! What device are you looking to get? May you please clarify a bit on what you mean by transferring data? The data included in the plan is accessible to all the lines (barring any talk & text lines). Unless specified, all bonus data is shareable across all devices on a Share Everything plan as well.
Hope this answers your question. Feel free to reach back out if you have anymore questions about the Share Everything Plans.
Pixel 3 is a solid choice! Wanting to keep your existing bonus data and plan certainly makes sense. We would need to take a look at your account to see what options are available for you but we can certainly try and find the best solution for you.
Whenever you're available you can reach out to Rogers through phone or Live Chat, contact information is available "here."