How to Nokia Lumia 1020 Insert Sim IC Solution Jumper Problem Ways Nokia Lumia 1020 Insert Sim IC Solution Jumper Problem Ways in case of insert sim problem in Nokia Lumia 1020 it will show insert sim, sim not valid, and may not show signal.to solve Nokia Lumia 1020 Insert Sim IC Solution Jumper Problem Ways we have to do a few simple steps as given in this post