The Sprint TP2 is sim unlocked by default, but the radio is locked from using US GSMs. Telus is CA, so not sure why it wouldn't work. The only thing is to try to get the WU radio firmware and see if you have any luck.
As for flashing a Telus "radio" I assume you tried putting a GSM radio to a CDMA device. I'm surprised you didn't brick the device.
-- Starfox
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