I'm a newbie here so please be patient with me! I am using a 7710 and have been told that the 7710 will support a 1GB MMC card. The person who told me this claims to be using one in his 7710. I notice in the 7710 specs that the 7710 only supports upto 512MB MMC. I have tried a new 1GB in my 7710 but it doesnot detect the card (strangely it also doesnot detect the 128MB card supplied with it in the box). I have noticed other threads mentioning 'different voltage MMC cards'. Should it automatically detect a card (formatted or not). Any ideas?
Maybe u've a corrupted MMC. Try to browse it using "7tools partition manager" (windows). Put ur MMC in card reader and run 7tools. If u see a red sign in ur MMC drive with 7tools, then u've a corrupted MMC. U've to delete them all, create a new partition, format it, make it active. After that, put ur MMC in ur phone and format it again.
Try to boot ur phone with Safe Mode (hold the pen/pencil key while booting)