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This msg started to appear repeatedly in the last 4 days out of no where !!
I'm restarting my mobile several times per day ,, any help ??
Better perform a software repair using Xperia Companion. This will do a clean installation of the latest firmware and will also wipe your internal memory. Don't forget to backup using Xperia Companion, but preferably without adding apps or settings to the backup.
Follow the steps given in blue links, and keep us updated.
How to fix it