4 Ways to Power Up a nokia phone by not touching the power button

The following information was posted here.

I have dyed my comments in green.

nokia service manual tells that powering up is possible by:

• Connecting a charger to the phone. The CCONT recognizes the charger from the VCHAR voltage and starts the power up procedure. Sometimes the phone is not powering up in full "normal mode" but in communication enable mode. The Nokia 1110i I have for testing is in communication mode with charger plugged in. See how to power up here.
  
• Pressing the power key, that generates PWRONX signal from the power key to the CCONT, this starts the power up procedure. This is really boring and does not fit into the headline!!!
  
• A RTC interrupt. If the real time clock is set to alarm and the pghone is switched off, the RTC generates an interrupt signal, when the alarm is gone off. The RTC interrupt signal is connected to the PURX line to give a power on signal to the CCONT just like the power key. Okay boring as well but maybe a fall-back for extreme hard cases you can setup a wakeup one minute, hour or day in future and poll if something have to be transmitted or someone have to be called. After this the phone should be shut down again.
  
• IBI-pulse. When a short (10ms) voltage pulse is applied to the BTEMP pin, the CONT wakes up and starts the power on procedure. This is used by the HDa12 Service tools.
  This sounds interesting but for this case the soldering iron have to be warmed up, because I do not know any Phone where this pin is lead out to the data connector.

Another promising sounding approach is to simulate a nokia car-kit there are some logs in the gammu documentation. Have a look at this.

If there are any other ways to wake up a phone, please drop me a comment.