this is the hundred time i made referbush to my n900 and every time after couple days the phone back with old problem no vibration , the contact and the conversation close with internal error and finally it's restart alone until i make referbesh again is there any solution for this i have to make referbush at least 10 time per month !!!

what do you mean "referbush". Do you mean reflash?, do you mean COMPLETE REFLASH without RESTORING ANY BACKUPS?

Please explain.

You keep on creating new threads with this same problem, but don't follow them up? Why not go through some of the old threads and look at some of the ideas that have been suggested, try them and post some feedback?

At the very, very least: Flash your phone with both the rootfs AND EMMC. Don't restore any backups. Does the problem still exist?

And still, the large font won't help you...

i only made backup for contact and i made reflash for both roffts and emmc still same prob every time error mesg and after couples days stop vibrating and just make restrart by it self so again i make reflash !! any help ??