The Blackberry Playbook is in a precarious position as Sprint announced today that will not carry the 4G WIMAX version of the device. Instead RIM is going to focus on 4G versions issued to Verizon and AT&T. Research in Motion is having a hard time trying to sell the Playbook to various companies that run LTE or 4G networks. Verizon famously snubbed the Playbook once … [Read more...] about Sprint Passes on the Blackberry Playbook and RIM Focuses on Verizon and AT&T as Its Last Hope