LookingUp:
I was looking at getting the Xiaomi Ultra 15 phone as a replacement on the Black Friday special deal ($200+ off), as there would be value in having the excellent camera on that phone, but it appears that it's also not an officially supported Spark device so we run the risk of a similar problem down the track but with a much more expensive device.
You're best to get a new phone directly from Spark, that way it's guaranteed to work.

