I had
- VIrgin mobile iPhone 4 CDMA phone
- Samsung CDMA phone of boost mobile
Jailbraking iPhone and setting up it wth cdmatool didn't take long time, I've registered ESN with my CDMA carrier before so I had phone line working in half an hour on my iPhone
With samsung I had to pass through painful flashing, SPC reset and so on but finaly CDMAtool could recognize device and I set it up for my carrier too instead of one detail, I changed ESN of Samsung to iPhones' one
Both devices could register in the network
- inboard SMS could get only one of two
- incoming calls could answer both phones ! So I had conference call
I reverted back ESN on samsung on factory one so test is successful