[teddyh2o]

I recently purchased class 10 MicrosSD card for my Evo 4G and i did SD Card Speed Test app and it shows only class 4. It's kingston brand and writing/read speeds is pretty quickly but it stalls a lot. any help?

[takeshi]

You're only as fast as the slowest link in the chain -- probably your device in this case.

IIRC, Kingston hasn't had the best reputation recently. I seem to recall running across some info that indicated that Kingston was getting bad cards. You might want to do your own searching on the matter.