Motorola V600 Phone (T-Mobile)
You get what you pay for!
I'm kicking myself for not doing enough research before buying this phone.  Bought this V600 and a V300 on impulse based on 1) the VERY low prices, and 2) good customer satisfaction reports from Consumer Reports for T-Mobile:  second only to Verizon.  But I made a huge assumption that all GSM networks are created equal, so although I was switching from AT&T/Cingular's GSM network to T-Mobile's GSM network, I figured network coverage would be the same.  Also, since Amazon advertises this as a \\"Quad Band\\" GSM phone I assumed it would be able to roam everywhere that there was ANY GSM signal. WRONG!  First problem:  T-Mobile only supports the 1900 MHz band in the US.  The phone is actually only a Tri-band, and the missing fourth band is the 850 MHz band that is growing rapidly in the USA, especially in rural areas.  So a couple of days after getting the phone I had the frustrating experience of driving for several hours in a rural area of Texas where my wife was easily conversing on her AT&T wireless V180 quad band phone, while my GSM phone had no service at all.  Got home that night and started the research I should have done in the first place, to find out that T-Mobile has very limited roaming beyond major cities and interstates, and appears not to be positioned to support the 850 MHz band, which in addition to being the future of rural GSM, apparently has better reception characteristics everywhere (like penetrating deeper into buildings).  So now I'm really ticked, but frankly it was just too much hassle to consider returning the phones, getting new AT&T/Cingular phones, and hoping to somehow port my phone number to the new carrier.  Luckily I'm only committed to one year, so I can jump to Cingular if T-Mobile hasn't decided to support broader roaming by then. <br /> <br />On the good side, T-Mobile lived up to its reputation for good customer service.  Pleasant and knowledgable CSR handled consolidation of my two Amazon purchased phones into one family plan, and the porting of my old AT&T wireless phone number to the new phone(took less than 12 hours).  And the phone itself has been great.  So if you don't care about roaming, this phone might be perfect for you.  <br /> <br />Also, I learned how to enable the 850 MHz band of the phone with some \\"Seem editing\\" tools available widely on the internet, making the phone a \\"Quad Band\\" again (and you can make the V300 a quad band too!) -- but that doesn't really do any good unless T-Mobile starts supporting roaming onto the 850 MHz networks.