General ATT or international (not the usual set of questions)

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http://androidforums.com – I honesy searched multiple forums but have not seen specific answers to the following two questions: 1. Is resale value of international version of Samsung Note 2 significantly higher/lower than carrier branded version (ATT in my case)? 2. What about warranty/tech support? I know where to go if anything happens to a phone branded by the carrier. Is there US version of international Note 2 (I do not think so)? If not - where do I go when "stuff goes wrong"? I am aware of course there is no LTE in international version, and other obvious differences (such as absence of carrier bloat (General)