New leader for Motorola's cell phone department

Motorola has announced that their cell phone department will be led by Sanjay Jha (previously Executive VP/COO/President at Qualcomm) from now on, and he will also be the co-CEO of Motorola. The news has successfully surprise mobile market analysts, as a leader, who has previously been working ata  hardware company, can be a serious tactical force for Motorola, a company which is currently going through some quite difficult days. It is of course a serious question why did Motorola decide to choose another leader besides current CEO Greg Brown.