From July 15 2015:
After September 10 2015:
On March 11, 2015, SCE notified users that they must activate their PlayStation®Vita (PS Vita)/PlayStation®TV (PS TV) systems in order to continue playing their PlayStation®Mobile (PSM) content after the termination of the service. However, it has become apparent that even if users activate their devices by following the notified procedure, their devices may become deactivated in certain cases.
In response to the above, we have set a new device activation method and implementation period. We apologies for any inconveniences this may cause, but we ask users to perform device activation by following the instructions below.
Device activation procedure*1:
*1 Even after users complete the above procedure, if they swap their PS Vita memory cards or backup/restore their PS Vita/PS TV data, they must connect to the network the first time they are accessing PSM content.
*2 Up to three compatible devices (PS Vita, PlayStation®Certified devices) can be activated.
*3 If users deactivate their devices after February 29, 2016, they will no longer be able to play their purchased PSM content on the deactivated devices.
Unfortunately, we will no longer be providing customer support on PlayStation Mobile content after September 10.