Help Need to update mytouch 3g to 1.6! Help please

[tracyjlagrange]

I got a t-mobile mytouch 3g (non headphone version) in Aug from ebay.

Model # = T-Mobile mytouch 3G
Firmware = 1.5
Build # COC10

I have Iwireless as my carrier not Tmobile and have called both and neither can help me update the phone.

From what I've read I need to be upgraded to 1.6 before the 2.2 will update on my phone. Anyone know how I can get the donut or is rooting my best option?

Thanks in advance!
Tracy