Instant messaging app Kik Messenger got booted off Research In Motion’s BlackBerry App World in 2010 after the two companies fell out. It has since proved popular on Android and iOS, as one of the apps looking to kill off text messaging – WhatsApp is another one.

Now Kik is back on BlackBerry, but not as a native application. It’s a Java (J2ME) app which doesn’t require approval by RIM or the use of its ‘code signing keys’ – used by RIM during the previous dispute to effectively make Kik Messenger useless to BlackBerry users.

Kik notes that the new version has not been endorsed or approved by RIM, and specialist site BerryReview points out that using J2ME means Kik won’t have access to the more advanced features of the BlackBerry OS.