Just a few hours ago Nokia released firmware upgrade for Nokia X6 and now they have release firmware update for Nokia E52 to version 31.012. The firmware can be updated only via Nokia Software updater (NFU) and not Over The Air (OTA).
Like always, even though Nokia E52 posses User Data Prevention (UDP), that is, you may not lose data while the upgrade, we suggest you to backup all your data. There’s no harm in being extra cautious.
Though the change log is yet not available, we will update you on that. If you upgraded your Nokia E52 to version 31.012 and notice any changes please let us know via comments.