I still own, and use, an S3 mobile phone. Lately, it's become quite slow to install an update; indeed, the update process of a single app could last more than an hour!!! A couple of days ago, the update would always terminate in a reboot... But, to be fair, whenever the device is not connected to the Net, it works just fine.
I got rid of the cache, to no avail.
Any suggestions would be more than welcome and appreciated.