I'm actually trying to hack THOMSON THBK1-10 tablet (also know at VOYO A1).
This is a dual boot system with Android 4.4.2, and Windows 8.1, based on Bay Trail (Atom Z3720) CPU. Running kernel is 3.4.43
After a long fight, i gained accesses to /system and /data partitions.
I have so copyed su binary, and changed the access mode to ugo+rx. Good !
Sadly, this is not enough to gain root access. everytime i'm issuing su command i got into a $ prompt.
I must mention i only have ADB wireless for this device: the USB is acting as an USB host, it is not possible to plug it into a PC/MAC.
My question is what i must check, do, to gain root accesses ? What should i look, try, dig ?
Thank you !