Z750i support

If your phone freezes, hangs up unexpectedly, vibrates continuously or in other similar ways doesn't perform as it should, this can often be solved by performing a software update. Software may perform incorrectly for many reasons without there being a fault in the phone. Some problems may be fixed by re-updating your current software, while others may require installing a new software version.

You can update software quickly and easily with the Update Service; the application checks for new software for your phone and automatically installs it.

To keep your phone performing at its best, it's a good idea to perform a software update regularly. You might not always notice what an update has done, but it can prevent future problems.