Guarantee of a Blackberry

Question

Hello, I'm Gonzalo from Argentina, and i writing this to ask you some questions about the guarantee of a Blackberry 8520 and some problems that i have with the carrier.
First of all, i bought a BlackBerry 8520 on February 23rd 2010 at Claro Argentina (My phone carrier), the phone worked very well until on the last week of December 2010, it's keyboard started to fail. Claro Argentina changed my Blackberry with another one on January 5th 2011 and said me that i have one year guarantee of this new phone that was in exchange with the faulty one. Well last week, exactly August 30th 2011, this Blackberry started to show a message at its start up, it says uncaught exception about a mime type registration, after that i was unable to open any music or video file. So i decided to go with my carrier. There at my carrier office, a salesman told me that my Blackberry havent got any guarantee, that it is covered with guarantee of my previous Blackberry (That was changed on January 5th), and its guarantee was expired. At the afternoon of the same day, my sister went to the same office and talk with another salesman because she went to retire her Blackberry because it had problems and it was in guarantee. When the salesman called Maria Eugenia, gave my sister a new phone, she said that the new one has one year of guarantee from the day that it is delivered. So i gave my Blackberry for guarantee and this time, the salesman take it. The next day August 31st, i went the the Claro's Office to retire my phone repaired, they made a reset of the firmware, or they told me that. At the afternoon of the same day, the problem appeared again, so i went again to my carrier office to gave my phone for repair in guarantee. But again they said me that it wasnt in guarantee, because the guarantee is from my first blackberry. 
Well after all the history, i denounced them because they don't recognize the guarantee of a product that is guarantee. The purpose of this post is to ask if this Blackberry is in guarantee or not, i dont have any problem to provide you all the data you need to check the guarantee of this phone. I don't know if this is the right way to ask help, but is the only way i found because here in Argentina, i dont any Blackberry official Support to ask for help.
Also i want to ask another thing that i saw on my sister's blackberry, by the way, it's a 8220. At its back cover of the battery, it says in spanish that it is a refubished product (in spanish: "Producto reacondicionado"), when our carrier Claro changed the phone using the guarantee of the product, not supposed to be exchanged for new one, instead of a refubished one.
Again, i dont know if it is the right way to ask for help, i dont have any problem, to send another email o make a call, o go to somewhere here in Argentina. All i want is the true. I'm a Electronic Technician and a System's Engineering student and i know a great deal of this devices.
Thanks for the help, and excuse me for my English if i dont express my problem very well.

Answer 1

Does it show under Options | Status as a WLAN Mac Address?
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