From the data sheet (http://www.datasheetspdf.com/PDF/MT6582/785907/11):
"After that PWRKEYcan be released, pulling BBWAKEUP high will also turn on the handset. This is the case when the alarm in the RTC expires."
So it seems the hardware should support to turn the device on when an RTC alarm happens.
From the data sheet (http:// www.datasheetsp df.com/ PDF/MT6582/ 785907/ 11):
"After that PWRKEYcan be released, pulling BBWAKEUP high will also turn on the handset. This is the case when the alarm in the RTC expires."
So it seems the hardware should support to turn the device on when an RTC alarm happens.