What unlocked phone can work for boost mobile?

ok. i dont have a nextel, sprint or boost mobile acct. i just want to get a phone so i need this question answered before i go phone shopping. on ebay i found a motorola i855 UNLOCKED real cheap but it does not have a sim card. so if i buy an unlocked...

ok will this phone http://www.walmart.com/catalog/product.do?product_id=6537407 work on my att network ps its a gophone acount and dont say that it wont work with a gophone cuz the gophone sim cards works in my dads 3 work phone and my sister's 2 phones...

I have the 1$/day chat plan for boost but i want a new phone and not one of the ones boost has. Which services can i buy a phone for that will work on boost mobile simcard? I know that verizon does not use sim cards so you cant but which ones can?

will any sim card in the world on an unlocked phone work i want the mottorola defy but i have to get it unlocked because the sim card i have got now is on 02 and i have a 1year contract on it but will the sim card work on the unlocked phone because ...

Both phones use iDEN technology, both have walkie-talkie buttons and are Motorola phones. The Boost mobile phone and SIM are new and have been activated. The Nextel Motorola Buzz+ ic602 phone is a whole lot nicer. It is a little older and isn't in service...