There are some reason why MMC can't be read by handphone. MMC contain many important datas, or Business meeting time-tables. This is some reason why MMC can't be read and the sollution.
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System Error
MMC can't be read caused of MMC system was error. This problem often happens in MMC which have bad quality. Now, there are a lot of production or MMC's brand.
Solution
Taking MMC from handphone. First, connecting card reader with computer, copy datas that need into computer. and then formatting MMC with step right click then format. After finished format, copy data which you stored in computer folder. -
MMC Looked
It often happened. MMC's can't be read because we forget password which inserted. -
Handphone version not compatible
Sometimes, there is handphone which upgrade with higher version even can't be read MMC. But in lower version MMC can be read. Why can this happen?. It can happen because module or Hardware of handphone which upgrade support for the higher version, or Compatible. So when we upgrade handphone by highest version, it's not sure will make handphone better. Because many components has changes in capacities or add support component.
Solution
Downgrade the sofware -
Virus
Virus can causes MMC can't be read by handphone. Many virus will grow up and will attack MMC, so MMC will not function normally.
Solution
Giving your handphone anti virus. don't forget to update your anti-virus to protect our handphone. -
Handphone Error
Trouble in handphone can causes unread MMC. It caused of handphone system to MMC's connection part doesn't walk normally.
Solution
Checking electricity part with multi tester digital, and check that volt as according as standard that minimized to flow, or jumpering for stripe that broken or Weak.
