The copy of Blackberry OS 5.0 for Blackberry Curve 8520 has leaked out since last year, but only officially available beginning this month. It appears that the leaked version (v5.0.0.4111) and the official version (5.0.0.509) has different version number, which may point to specific carriers.

Apart from that, the most obvious different between the two is the key lock button, which is now using the mute button located on top of the device. Some also experience poor phot0 quality after upgrade.

The official upgrade is originally meant for Wind Hellas, but works with Curve 8520 running on other carriers as well. And for those looking for versions that support East Asian Language, you may try this one, an upgrade for Axis Indonesia.

p/s : If you fear of loosing your Blackberry App World (for countries that are not yet supported), please be advised not to upgrade.

Via