HTC 7 Pro network options?

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I friend offered me the opportunity to buy an HTC Arrive/7 Pro for a very attractive price, without contract, naturally.

Now, I love WP7, and I like my T-Mobile family plan (in the United States). Unfortunately, I'm a totally newbie in the area of using phones on different carriers. From what I understand, I think it's possible to use an HTC Arrive with a T-Mobile sim card, and make calls, but you cannot modify/unlock it to get 3G support, which I do kind of need.

Am I correct? Or am I way off? It'd be great if I could get it working, complete with 3G, with a little work, on the T-Mobile network, but it's just as possible that I couldn't even make basic calls.

3G worked fine (here in Europe) on tested HTC 7 Pro...

if you want use different mobile carriers, your device must be SIM free (SIM unlocked)

So, it would be possible to use my T-Mobile 3G, provided the phone was unlocked?

I've always been a bit fuzzy on the distinction between a normal non-contract phone, and one that is actually unlocked. I do know, of course, that unlocked phones go for a much steeper price then their locked counterparts...I've seen some websites detailing instructions how to do this, allegedly, is this something I could do myself to a non-contract phone (albiet with paying for a code)?

Phone must be unlock (no branding and no simlock). You nothng write about simlock that phone. When device not have simlock you can use everything simcard and everything frequency, but I don't know how work T-Mobile in your country (not from where you wrote) maybe operator locking 3G but i don't think. You must plug in sim card to phone and check that.

Ah, I'm starting to understand, I think. The HTC 7 Pro is, unlike a lot of Sprint's phones, GSM, HSDPA, WiFi, CDMA compatible--T-Mobile's phones are all GSM. I'm in the USA myself.

However, I can't say anything about frequencieis or anything like that. Has anyone ever tried? If not, I may have to just break down and try on the phone first (with an unlocking code).

I'm not sure but I think that HTC 7 Pro and HTC Arrive is the same only difference to Arrive not supported pre-NoDo. You must try plug in sim card and you learn.
On the page HTC specifications wrote that 7 Pro and Arrive frequency is the same:

Network
AT&T:

• HSDPA/WCDMA: 850/1900/2100 MHz
• GSM: 850/900/1800/1900 MHz

Telus:

• HSPA/WCDMA: 850/1900/2100 MHz
• GSM: 850/900/1800/1900 MHz

http://www.htc.com/www/smartphones/htc-7-pro/#specs
You must try.

Thank you, I think my only option will be to try.

I was able to find some information on T-Mobile's frequencies, but not Sprint's, at the moment.

I'll be able to return the phone, so the cost would be, potentially, the cost for the unlock code (assuming HTC won't give me one for free). I may have to try this out myself.

Sprint is CDMA and the Arrive doesn't have a SIM card (I have the Arrive and know this for a fact). You won't be able to use it on T-Mobile or AT&T.

Originally Posted by LayneRobinson

Sprint is CDMA and the Arrive doesn't have a SIM card (I have the Arrive and know this for a fact). You won't be able to use it on T-Mobile or AT&T.

I was about to say this, but I'll add my hat to the ring and also say there is no SIM card slot on the 7 Pro (Like there was on the TP2).

Though I wish there was. It makes the Photon look really compelling. :/

Really? That's extremely strange, there's a thread on this site showing how to access the SIM card slot and MicroSD slot.

http://forum.xda-developers.com/showthread.php?t=996015

Maybe this is only for HTC 7 Pros outside the US, which are not CMDA?