Durability issues of sd-cards in phones?
I had bad luck with any "cheap" cards that I ever bought. They usually end up being "off brands", and some of the slowest performing. The cheap ones usually don't even mention the class rating, which means they are probably a class 2, or worse. I never had them fail in the short time you seen, but they did fail, and after 2 cheap cards failed on me in my android device, I spent the extra couple bucks and went with a "name brand" class 6 (I couldn't even find a class 10 when I bought it). I have had this card for almost 3 years now, it has moved between 3 different android devices in that time, and has seen its share of custom android ROMs flashed to the host device. Not to mention it even had a time, before froyo, it was partitioned to with 1GB EXT4 partition to act as an "extension" of the devices internal storage, and even SWAP at one point on my ADP1. I have had zero problems with it.