Have you ever seen this one. The display has temporarily dimmed to help prevent burn in at higher temperatures. The display well return to normal brightness when the device returns to normal operating temperature. Never saw this prior to ICS. Coincidental? 4G with a lower signal i know causes battery to work harder but this is good i guess. Saving the phone. Btw it is operating normally and i do not see a dimmer screen. Its @ the usual daytime setting of 50%.