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Archos 70b Cobalt 4.2.2 dev/root

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Thanks Meter: 3
 
By veloo, Member on 3rd December 2014, 10:07 PM
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I bought two of these new in a black friday sale on 29th nov, and have been playing with it these past few days. i can't find much information apart from the archos website, which doesn't say much. how do i figure out whether this is a gen8, gen9, or gen10 device? the firmware image provided by archos support is dated a year+ older than what i have on my tablet. so, i am a bit reluctant to trash it.

to do:
- stock backup [found stock rom, see post #7]
- custom recovery [???]
- root [solved] see post #4

the above 3 are what i need to figure out, and i will update my findings here. hopefully, we might gather a few more people with this (or similar) device, and pool some thoughts together.
 
 
3rd December 2014, 10:19 PM |#2  
archos official specs page, with links to faq, manual, etc.
http://archos.com/gb/products/tablet...alt/specs.html

firmware update available from archos support: ARCHOS 70 Cobalt OS v 20131025.184318
is this the correct one? seems to be a year older than what's on my device.

Settings -> About tablet:
Model number: Archos 70b Cobalt
Android version: 4.2.2
Kernel version: 3.0.36+ Wed Oct 15 19:54:02 CST 2014
Build number: V1.0.8..JDQ39.201400110.105106

Internal Storage: 8g advertised
Total space: 6.21g
is 1g+ is lost in some overheads?
3rd December 2014, 10:30 PM |#3  
debugging is hidden.
click 7x on "Build number" in Settings -> About tablet
this gives a new option called "{ } Developer options" in Settings
now we can turn this on, and enable usb debugging, etc.

edit: just needed to update adb. i can adb to this device now
8th January 2015, 10:23 PM |#4  
Cool root success!
i've finally managed to root this device!

i installed iRoot apk from http://mgyun.com/m/en, which correctly detected and rooted my device successfully. it didn't install on first attempt, but installed fine on the second try. thanks to those guys.
9th January 2015, 04:12 PM |#5  
now that i got root i've started hacking this tablet.
battery drain is very noticeable! i'll probably remove most of the gapps bloatwares.. the older versions were so well behaved!
9th January 2015, 04:20 PM |#6  
but first i need to know how to backup/restore the stock rom, just in case!
10th January 2015, 01:26 PM |#7  
stock rom
stock rom: http://files.archos.com/recovery/fw/...alt/update.img
17th April 2015, 07:43 PM |#8  
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Quote:
Originally Posted by veloo

i've finally managed to root this device!

i installed iRoot apk from http://mgyun.com/m/en, which correctly detected and rooted my device successfully. it didn't install on first attempt, but installed fine on the second try. thanks to those guys.

could you upload IRoot apk? I've tried multiple times (try again option) with the current version, but it failed to root my device.
The Following User Says Thank You to quirine For This Useful Post: [ View ] Gift quirine Ad-Free
18th April 2019, 08:46 PM |#9  
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I have rooted my 7ob cobalt but now want to "un-root" it. Is that possible?!
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