You need a micro SD card insert to the Tablet TF Card Slot
If you download the file from PC
1. Download 4.0.4 ROM file from below link and extract it to get the update.zip file.
2. Connect the Tablet with the USB wire to the PC USB prot
3. Go to Tablet USB mass Storage Screen and tap on the (Trun on USB Storage)
4. Goto your PC My Computer you will find two new disk, one is Zeki disc
5. copy the update.zip to the root the new disk of the micro SD in the tablet (Don't copy to the Zeki
6. Goto Set UP
7. Goto About Tablet>SystemUpdate>Check Now>OK
8. The tablet reboot and go to the recovery screen
9. The recovery finish and power on again
10.. You will get the 4.0.4 TB782. Enjoy it.
Download the file and extract to get the updated file with the Tablet from the below link
1 When the file finished download open the Es explorer
2. Tap SDcard download folder and you will find the FID BN TB782B 4.0.4 rar file
3.Extract the file and you will find the folder and a undat.zip file inside.
4. Long Tap the update.zip file and a list jump up
5. Tap on the copy to and another list will jump out
6. Tap on the uppest row name /sdcard and with jump to another page
7. Tap on the /mint/extsd and tap to lowest row OK then the file will copy to the micro SD card
8. Follow PC download steps from 6 to 10
You will get the 4.0.4 TB782B.
But there is a chance to brick your tablet and don't blame me
If you want to get the google market(update.zip) and the G-sensor Tweak just download the attached files.
Warning: All the file and rom in this post is only good for the version mark FID:BN on the back cover beside the Made in China, Otherwise it will brick your tablet