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steps for upgrade phone 1. Setup a TFTP server in your local LAN . 2. Check IP for your TFTP server , for example your TFTP server IP is 192.168.5.10 3. unrar file , there are 3 file inside , 546.cfg , vr8x00.vi , vr8x00.vb 4. edit 546.cfg for your TFTP server , 546.cfg is a text file , you can use texteditor to modify. change [PROVISION] SERVER=192.168.168.128 FILE=546 [UPGRADE] PROTOCOL=TFTP SERVER_IP=192.168.168.128 PORT=69 FIRMWARE=vr8x00 PARTITION=vr8x00 to [PROVISION] SERVER=192.168.5.10 FILE=546 [UPGRADE] PROTOCOL=TFTP SERVER_IP=192.168.5.10 PORT=69 FIRMWARE=vr8x00 PARTITION=vr8x00 modift SERVERIP= and SERVER_IP= with your TFTP server IP . 5. copy 3 files to TFTP server root folder . 6. Connect WIFI press dial icon , then dial **6862* dial turn on menu , select "5 Wifi AP Scan" , select the AP you need and entry password . if phone show "Wifi not enable" , please press **6863*dial for enable WIFI . 7. Setup Provision IP after connect WIFI , press **6861*192*168*5*10# Dial , 192*168*5*10 is your TFTP server iP , if command is accept , screen will show Provision IP: x.x.x.x 8. setup provision file Press **6862*546# dial , screen will show Provision File 546.cfg 9. reboot phone . press **6868* dial , will reboot phone , you also can reboot by remove battery and put it back . 10. after reboot, phone will try to download 546.cfg from your TFTP server , please check the log for TFTP server , once phone got file , it will setup where to upgrade firmware . of phone is not download 546.cfg , please check does connection between phone and server . 11. Upgrade APP : after phone got provision file , entry menu again **6862* dial , select Upgrade APP , then press Yes , please check does upgrade is finish . phone will download vr8x00.vb when upgrade APP . this will take few mins . 12. Upgrade DATA: after upgrade APP success , entry menu again **6862* dial , select Upgrade DATA , then press Yes , please check does upgrade is finish . phone will download vr8x00.vi when upgrade APP . this will take longer then Upgrade APP . Please don't upgrade DATA before you upgrade APP . after upgrade DATA , you should have new logo for you , and please use **6863* for disable WIFI .