When I put a sd card or sim in my oppo neo7 it is not displayed and not working only jio sim is accepted another sim is not accepted. It Was so simple.
Press Power Key And Volume - Key At A Time For 2 or 3 Second.
Then Screen Shot will Captured Easily. Just suggest To Insert Sim And Then Go To Setting-Mobile Network-Perfered Network Type-Select Network You wants Like- Gsm-wcdma Or Lte And Then Use.