New to USB OTG? There's so much I have to say! I'll keep it brief, though.
Firstly, you need a Micro USB OTG adapter. Don't get a Mini accidentally. Also, 99.9% of them, particularly on eBay, will be Micro MALE to USB A FEMALE. Should you find a different gender arrangement then don't buy it, but really you shouldn't even worry because odds are it's correct.
Second, DO NOT BUY A CABLE!!! Get a solid piece. Seriously, most of them will have a short 3" cable, and those cables will kink in a matter of days! These are cheap Chinese parts, the cable version will not last, especially if you use it on the go, storing it in your pocket! The solid piece version should be the same price, give or take a few cents, they're just not as common, so take an extra two minutes and hunt down a solid piece!
Third, just an eBay tip, you shouldn't pay more than $2, shipping included. I got 10 solid pieces for $5, shipping included. I HIGHLY recommend you buy a two pack, or more, since these things are very easy to loose and once your friends, family, coworkers, etc see yours they will likely want one for themselves. In many cases you can get 4 or more for the same price as a single adapter from a different seller if you just look around a bit. Oh, by the way, I got mine as a buy it now item, so you could get even cheaper than 50 cents each if you are willing to bid on them.
Maybe you could even buy 10 like I did, and sell a few. Make your money back and even turn a small profit! :-$
Anyways, try to get one
like this:
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Not like this:
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And defiantly not this:
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Notice the smaller tips... even this one is WRONG:
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So, make sure it's a solid piece, the smaller end is MICRO, not mini, you pay $2 or LESS, and have lots of fun! There are limitless possibilities!