Step:
1, please plug the battery
2, press power key to power on,
3, then press "F1"+"1" key together, until show "Language setting"
4, select "2. English" go to "SYSTEM TEST"
5, press ENTER(green) key to turn page.
6, select "6-WLS" to "1-Gprs Test" to "1-WlsInit" until show "Init Complate"
7, press ENTER key back to "1-Gprs Test", then press "*" to check version, finally you can see boardVer:, it is the IMEI