Amazon patent applications published on 21 February 2013

3 US patent applications published on 21 February 2013 and assigned to Amazon

1 20130046874 DYNAMICALLY MIGRATING COMPUTER NETWORKS
2 20130044660 HOME OR HIGHER PRIORITY PLMN SCAN IN 4G CONNECTED MODE
3 20130044613 OPTIMIZING VOICE CALLS ON PACKET SWITCHED NETWORKS