1) You must install java virtual machine on your PC windows to run .jar file 2)No! You must edit "storage" file in windows REGEDIT Go to Start --> Run --> Type regedit in the Run. Go on this directory: Code: HKEY_CURRENT_USER\Software\JavaSoft\Prefs\org\pete rbjornx\whatsapp\storage -Edit the file by entering the correct values: (Example with the Italian prefix,edit it with code for your Country!) Code: : / C / C 39 (international prefix,without "+") / C / O / N / T / A / C / T / S - / I / M / E / I 35********* (IMEI code of your n900) / L / O / G / I / N 393******* (phone number to be recorded on WhatsApp, including international prefix) / P / H / O / N / E / N / R 3******** (phone number to be recorded on WhatsApp without international prefix) / R / E / G / S / T / E / P 1 - Restart the java version and enter the code arrived by text message. From this point you have to use N900 Ok?
HKEY_CURRENT_USER\Software\JavaSoft\Prefs\org\pete rbjornx\whatsapp\storage
: / C / C 39 (international prefix,without "+") / C / O / N / T / A / C / T / S - / I / M / E / I 35********* (IMEI code of your n900) / L / O / G / I / N 393******* (phone number to be recorded on WhatsApp, including international prefix) / P / H / O / N / E / N / R 3******** (phone number to be recorded on WhatsApp without international prefix) / R / E / G / S / T / E / P 1