I have the Androids Unimax U673c. I have noticed the past few days or so. My WiFi on my phone turns it self off and I do not know why. I can turn it back on but sometime when I am not using my phone but it is turned on and I have it set to have the WiFi on at all times. I have rebooted the phone, Taken the battery out then started it back up but it still happens.