Nokia is boosting confidence in its post-handset future by investing in new plans for all three of its remaining businesses. Its core infrastructure business has new alliances in key areas, like one with Juniper for telco cloud, and the cash to make acquisitions if necessary. The IPR unit has clear opportunities to chase direct revenues for patents, free of the cross-licensing that goes with handset manufacture. And Here, the location services group, can also cut the last ties with the Nokia devices, and extend its reach into iOS, Android and new developments like the connected car. Nokia has posted job adverts on LinkedIn seeking Android and iOS software engineers, which suggests it will soon be bringing its well-regarded Here mapping…