Will bigger Micro SD slow down mobile I have Karbonn A5+ Android phone running (stuck at) Gingerbread. I want to buy a micro sd card for it and I want to get max speed out of it.

My mobile has 1GHz single core processor.


Will SanDisk Ultra Class 10 give me max performance?
Or are there any internal limitations/specs to mobiles that just constrain the use of all speed that micro sd card has to offer.
Also, will bigger sizes (32 GB) slow down my mobile?
And there is this another breed Mobile Ultra class 6 but with speed up to 30 Mbps! What should I go for?
MicroSD cards (Virtually) do not increase performance. They only increase the amount of data you can store. Your phone can go up to 32Gb but most people will not need that. Go with the cheaper one since you will not notice a performance hit.