To participate in the soak test, you must be a member of the Motorola Feedback Network and have your Motorola Moto X registered. This could be a test for an update similar to the one for the rear camera that T-Mobile customers with the Moto X received just the other day. Motorola Mobility's VP for Product Management, Punit Soni, posted on his Google+ account on Tuesday, that other carriers will be receiving the update.
Thanks for joining the Motorola Feedback Network. We are inviting owners of the Moto X on AT&T to participate in an early preview of a new software release, and provide feedback. If you are not currently using an AT&T Moto X, please excuse and ignore this email.
Click this link -- [redacted] -- to take the enrollment survey if you wish to take part. Note that you must be a member in good standing of the Motorola Owners' Forums to be included. The registration window could close without notice so please respond as quickly as possible.
This is a confidential test under the terms of the Motorola Feedback Network. Do not post any details or information about this on any public sites.
Thanks -- please understand that start times are always fluid. We ask for your patience if you register but don't hear from us right away.
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Another possibility is that the update being tested is the one that brings Android 4.3 to the handset. Considering that the Motorola Moto X is the first Motorola smartphone built with Google's input, it should be one of the first non-Nexus or Google Edition devices to receive the Android 4.3 update.