With carriers experiencing a 120% increase in BlackBerry app downloads, RIM today announced that more than 40 carriers around the world have now deployed integrated carrier billing for their customers on BlackBerry App World. BlackBerry App World is now available in 164 markets and territories worldwide. More than 60,000 apps are currently available on RIM’s app store and over 174 million apps are downloaded each month. Over two billion apps have been downloaded to date.   The deployment of integrated carrier billing is an example of RIM’s ongoing commitment to work together strategically with its carrier partners and it has proven to drive significant value for the whole mobile ecosystem,…