New official ROM 3.003b.00 EN
ROM-English: The upgrade does the following:
1. Improves standby time
2. Improves system stability
3. Increases ringtone volume
4. Reduces camera power consumption and improves the auto focus
5. Enhances power saving for Wi-Fi
6. Fixes the problem that the system doesn't reconnect to Bluetooth headsets automatically when resuming from sleep.
unfortunately you have to have an original ROM to upgrade (there is no extrom.bin & flash.bin only a file named Acer_S200_3.003b.00_EN_03.03.08_3.003.01.amf. You can downgrade your custom ROM using hacked euu to an official one and then upgrade to this ROM).