UNLOCKED ANDROID PHONE & UPDATING IT

I just had a question for anyone with an unlocked Android phone and going about updating it

So i have an Unlocked Motorola Cliq which when i bought it , it was locked and then i unlocked it for it to work on WIND Mobile here in Canada. This is the one from T-Mobile and i bought off of eBay last year. And on Motorola's website, there is an update for it to update to Android 2.1 from Android 1.5. So what i am wondering is that if i was to update my phone, would it make it locked again and causing the phone to be unable to be used. So if anyone has an Android phone which is unlocked and updated that phone and had or did not have any problems such as it becoming locked again. Please if someone could help me, that would be Awesome.