N900T UNLOCK AND IMEI GUIDE

official firmware 4.4.2 then reset efs and repair imei like this

1- Select Supported Model From List

2- Put Your Phone In Download Mode

3- Reset Default EFS

4- Select Comport Use UART Cable

5- Chose Supper IMEI

6- Select Repair IMEI + UNLOCK

7- Do Factory Mode

(Further Network and 3g Problems)

8- Select Comport Use UART cable

9- Dial *#7284# and choose UART -> MODEM and Qualcom Setting DM+MODEM+ADB

10- DIAL *#0808&# Select DM OVER UART

11- Do 3G NETWORK REPAIR