Can someone tell me whether these will fit in mobile phones?

i bought this for my samsung D900, works a treat! i dont see the point in spending loads of money on top brand names when this does the job twice as good.... the only small downfall was transfering data to the card, can be a little on the slow side... but other than that a great product and to get an adaptor included also was a bonus for just £5.99

Fitted right in my MDA Vario. Nice touch having the full size SD card adaptor and a wee case to keep it warm.

Seems fast, didn't feel it was worth spending 3 times the price on another brand that is 1/2 a ms quicker.

Very good buy!