[anton85]

Downgraders from 2.71/2.80 causes a non-critical defect (but there about 5-6 suck bugs appears!) of ID Storage Keys on TA82, after it you must use KeyClearner.

After uses Pandora on TA82 to downgrade to 1.50 you got fixed 5th key and normal state of other keys. (if you don't damage your ID Storage before)
For guaranteese you may test your keystate with KeyClearner.

Without this keyfix you couldn't run 1.50 on TA82 and Pandora wouldn't work, because it, it patched your 5th key.

With fixed 5th key you can install any CFW (OE, or better M33).
(but not 3.30+ OFW!, your 5th key will be refused by Sony Firmware Installer).


But, if you suddenly want to return to license-life-style you can install 3.30+ OFW by following these steps (Pandora required!, and 1.50 Enabler Home-Brew):

0. Have 1.50 with normal keystate: after pandora downgrade from official FW, or after using keyclearner on your custom firmware.
1. Install 2.71-3.11 OFW. (patched 5th key allow install OFW 2.71-3.11 on TA82)
2. make nandump this FW with Pandora.
3. return to your custom firmware with restoring it's nand dump with Pandora (or you say, that you have pandora, but don't have nand dump of your custom FW ? - make it!)
4. run 1.50 enabler on your custom FW, then press '[]', 'O'.
5. run pandora recovery menu and restore nand dump of your 2.71-3.11 (DON'T choose "restore ID-Storage" while restore nand dump!)
6. You got 2.71-3.11 OFW, with fully original keystate, that allow you install any OFW.