[Nokia N1] syddd:
Official images/ROMs

If you check for update the device makes a POST request (you can make one with Chrome+POSTman extension) to Foxconn's servers at http://www.fc811.com/OTA/GetOTAFirm...kia_N1&fw_id=XXXXX&serial_no=YYYY&version=1.0

where fw_id is your current firmware version and serial_no is you serial number (this is not validated, you can enter anything). This returns a JSON that contains a changelog and a link to the update.

Valid fw_id-s and their download links (there might be earlier versions)

A5CN114

?

A5CN204

http://ota-service.oss.fc811.com/up...634e32cd5ec2&filesize=331308554&sn=L123456789

1. Z-Launcher update to v1.1.3-beta

2. The Store update to v2.60

3. Fix wrong brand name

4. Change Browser's default homepage to http://n1.nokia.com/cn

5. Fix some of the audio jack detection failure while plugging/unplugging earphone

6. Fix speaker crack sound issue in high volume level

7. Unstable speaker volume issue has been improved

8. Improved Bluetooth device discovery stability

9. Improved video playback smoothness while pausing and seeking

10.Improved performance on some apps Mail, The Store, etc

A5CN20C

http://ota-service.oss.fc811.com/up...c634ec3565efa&filesize=18216049&sn=L123456789

1. Fix unstable speaker volume issue

2. Fix Gallery crash when deleting last photo

3. Fix wrong Wi-Fi status when connecting to Internet in China

4. Fix wrong battery capacity information

5. Fix wrong APP icon size in Android Launcher

6. Update The Store to v2.61 for stability fix

7. Other Minor fixes\n

A5CN21B

http://ota-service.oss.fc811.com/up...c634fbd4f5f58&filesize=22680398&sn=L123456789

1. Z-Launcher update to v1.1.4-beta

2. Upgrade Android OS to the latest version 5.0.2

3. Optimize the wake up mechanism caused by notification

4. Optimize defragment mechanism of the storage

5. Fix color display error in some picture formats

6. Update Intel translator"houdini"

7. Optimize notification mechanism of the system OTA upgrade

8. Fix Wi-Fi enable failed issue in some cases

A5CN30B

http://ota-service.oss.fc811.com/up...c6350085b5f78&filesize=15641612&sn=L123456789

1. Z-Launcher update to v1.1.16-beta

2. The Store update to v2.62

3. Optimize the double tap to wake up feature and touch stability

4. Fix dual channel recording issue with some 3rd party app

5. Show actual date with calendar app icon in android default launcher

6. Add headset icon to show headset connection status

A5CN315

http://ota-service.oss.fc811.com/up...c635057645fa1&filesize=19534931&sn=L123456789

1. Z-Launcher update to 1.1.18-beta

2. Fix duplicate contact on home screen with android native launcher

3. Modify maximum headphone volume and alert icon to reach european standard

4. Optimize network connect compatibility

5. Optimize OTA download configuration

6. Optimize ambient light detection accuracy and enable adaptive brightness as default

7. Optimize boot animation performance

These are .zip files that contain a boot RAMDisk and the patch. Android patchfiles are binary diffs, so they cannot be extracted/messed with as I know.

BUT the 204 update is an exception, its 300+ megs whereas the others are 20-30 megs. This was not made with the binary patch method, so (to my best understanding) it contains a full system image in the form of a system.new.dat file. According to a post here they can be extracted.