Galaxy Note 3
From Jon's Wiki
Enable Developer options
In Android 4.2 and later, developer options are disabled by default. To enable them, go to About Phone, and tap "Build Version" seven times. Now there's a "Developer options" in your settings, which can enable things like
- USB debugging (for use with the Android SDK),
- an advanced reboot menu, and
- hard-killing apps with a back button long-press.
Installing the CACert root certificate
The root certificate:
wget https://www.cacert.org/certs/root.crt cat root.crt > 5ed36f99.0 openssl x509 -inform PEM -text -in root.crt -out /dev/null >> 5ed36f99.0
Rinse-and-repeat for the Class 3 certificate:
wget https://www.cacert.org/certs/class3.crt cat class3.crt > e5662767.0 openssl x509 -inform PEM -text -in class3.crt -out /dev/null >> e5662767.0
Copy these two files onto your phone, then on your phone using the Terminal app:
su mount -o remount,rw /system cd /system/etc/security/cacerts/ cp /sdcard/5ed36f99.0 /sdcard/e5662767.0 . chown root:root 5ed36f99.0 e5662767.0 chmod 644 5ed36f99.0 e5662767.0
Then reboot your phone.
Or use the Android SDK
If you can't be arsed typing all that into a terminal on your phone, fair enough, it's quite tedious. Instead, you can use the Android SDK to copy shit to your phone and run a shell:
~/android-sdk-linux/platform-tools/adb push e5662767.0 /sdcard/ ~/android-sdk-linux/platform-tools/adb push 5ed36f99.0 /sdcard/ ~/android-sdk-linux/platform-tools/adb shell
Then type it here instead. You'll need to enable USB debugging first, which is a developer feature (See above.)