How to Disable Message Preview on Lock Screen on Galaxy S5
Unlike so many Android devices, on Galaxy S5 you have the option to specify whether to see the message preview on the lock screen on status bar or ...Continue
So, you have activated your unlimited plan and want to use it? You just need to do as follows to disable / enable mobile data on Xperia Z and other Sony Xperia devices:
1. Open Settings application
2. Under Wireless & Networks tap "More"
3. Open Mobile Networks.
4. Mark "Mobile data traffic" to use the internet via your mobile network
** Note that to avoid extra charges, make sure Data Roaming is disabled. Otherwise you will be receiving data when roaming