My Experience

Nokia 2320 Classic, Sim not valid problem in Nokia 2320 Classic can be cause of water damages or broken parts in the mobile phone.To solve these problems keep reading this post and look at diagram all cellular mobile repairing solution here Nokia Asha 311 Signal Network problem solution jumpersIn above diagram you can see Sim Ic that is used in Insert sim problem solution. So remove this Ic and apply jumpers as shown in above diagram.
A zoom image is given with it and blue color lines show jumper ways.
for more detail and new tips and tricks about cellphone service problem keep visiting this page we will update cellphone service diagrams timely with new cellphone diagrams.some related post are also given bellow you can read them also for more information about cellphone.