T-mobile ROM vs. i-Mate ROM

[HyperMalac]

Hello.

I've heard somewhere that the i-Mate ROM hasn't got any ExtROM. Is That true?
And another question: How can I downgrade a ROM what is says the next message: Upgrade Only!

[SuperRob]

iMate simply doesn't have any additonal files loaded in the Extended ROM. T-Mobile has specific customizations, like setting up the phone and text messaging to work on their network. If you use your phone on T-Mobile, I'd stick with their ROM (or a custom T-Mobile ROM) unless you're comfortable with changing all of the settings yourself.

As for the downgrade issue, you need to CID unlock your phone.

[HyperMalac]

I've already CID unlocked my PDA, but the upgrade program says UPgrade Only. Did I missed something?

The I-mate ROM hasn't got any extrom, and the space of the extrom goes to the storage/program memory? so if I upgrade to an i-mate ROm I should get more storage/progam mem?