Rk2928sdk 3g 7 inch firmware need please help us

[taleb]

hello all brother
i have problem
please help me
i cant found firmware under tablet

info
g-touch tablet pc 7 inch 2 cam sim card 3g rk
Manufacturer: Rockchip
Brand: Rk2928sdk
Model: rk2928sdk
Alias:
OS Version: Android 4.1.1
Processor: ARMv7 Processor rev 0 (v7l)
MemoryCapacity: 386MB
AvailableMemory: 43MB
Screen Size: 432x800
Screen Size: 432x800
BootLoader: unknown
Serial Number: OX9HZV4VP8
Daemon Version: 4.7.0.4451
Daemon Version: 4.7.0.4451
please help plz plz plz