what is the best one i can put in my phone?
i need a fast one to play movies the stock one is very slow and movies lags a lot thx for the help
Well - that all depends on the money you want to spend
Here's a good card -32 gb - class10 !!! fast as F**K,
http://www.mymemory.co.uk/Micro-SDHC/Verbatim/Verbatim-32GB-Premium-Micro-SD-%28SDHC%29---Class-10
HTC Desire HD a can take 32gb - thats cool.
ALWAYS CHECK IF CARDS ARE COMPATABLE WITH YOUR PHONE
BUT My advice to you would be to buy 2, 16gb class 10's - like these ones-
http://www.mymemory.co.uk/Micro-SDHC/Verbatim/Verbatim-16GB-Premium-Micro-SD-%28SDHC%29---Class-10
Verbatim are famous for making high quality dvds/ cds and have branched into the world of memory, they have decent reviews too,
If these are out of your price range then look at manufacturers like sandisk and kingston and lower the class to say Class 4, which are cheaper - like I said before i'd advise buying 2 of the lower capacity, cuz if a 32gb card breaks you lose everything, when if you have 2, 16gb cards - you'll only lose 1/2 the data.
PNY make cards, at a good price to - but are re-nound for overheating as are most cheap makes.
below is a excellent link/guide to the class/speed rating of micro sd cards:
http://sdcard-speed-guide.articles.r-tt.com/
Hope this explains thing things to you and helps guide you in your purchase
Thank me if I helped - ON THE THANKS BUTTON BELOW