How to repair Nokia e90 bluetooth fault

For nokia e90 bluetooth error, bluetooth can not ON,

1. Remove you memory card and Restart you cellphone first,
2. Check your address bluetooth by pressing #*2820#
3. If the bluetooth still can not power on
4. Try to upgrade firmware, updating firmware need repair box ( like MT Box, JAF, etc)
5. If the problem not solved, check blutooth module, replace if needed.