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Whats the minimum Micro SD card size that my phone HTC Explorer can detect? I used a 2GB card, partitioned it into two sizes, 1GB - ext4 logical & 700+ MB as primary Fat32 ( the default that it was before).

Now when I insert the card back to my phone ( I used a card reader to partition it ) , my mobile is not detecting the Micro SD card.

thanks in advance

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Is it possible that your mobile does not support partitioning? – Uwe Plonus Nov 23 '12 at 8:32
Or it's getting confused about the ext4 partition. Are you sure your phone supports that? Do you run a custom ROM? Which Android version? Oh: I just see "logical". No need for that unless you want more than 4 partitions. Never heard it used on sdcard either. You might want to try with primary partitions only. – Izzy Nov 23 '12 at 11:13

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