ArduinoPhone

Hello,

  1. no,this GPRS Shoield is only newer version as far as i read! U need to put an battery inside. do not know why, but without was not working. the battery in the rtc timer keeps the clock working when power is disconnected.

  2. no, should make no difference.For testing you need only connect the ardiuno to power!

  3. Timer connection to arduino:
    SCL = A5
    SDa = A4
    VCC = VCC
    GND=GND