Samsung Galaxy S2 tip
It seems that Samsung is using by default the fast dormancy, a new technology which tries to save your battery life by turning your phone completely connection less if no activity is detected. This is cool, right? Not really, since in order for this to work, network provider has to support it as well, which makes the completely opposite effect, by draining the phone battery and still make phone disconnected when idle (e.g. no SMSes received). To disable this (my strong suggestion), do the following: *#*#9900#*#* and then choose disable fast dormancy and then Exit . I have tested this already for 1 month, and it works pretty fine, and battery life is extended definitely by some 20%-30%. Summary: - it prolongs/extends the battery life - it solves the issue of phone being completely disconnected at times Sources:http://www.blogger.com/img/blank.gif Source More about fast dormancy: Here Some other codes are also interesting, which I haven't tested yet (but will t...