Notes on using Adobe Digital Editions (ADE)
Each ADE ID supports only 6 devices, this includes the master device
(the Omnia) and the slave device (SD card).
When the Omnia is restored to default settings, ALL DRM activation
record and data (including DRM books purchased) will be erased from
the Omnia. You are required to authorize the device with your ADE ID
again.
When the number of authorized device has exceeded the allowable
amount, you will come across the following error message:
E_ACT_TOO_MANY_ACTIVATIONS