GSM Module Sim800L cant connect to network

Hi RaviPijar can you please help me, I cannot start my project and we need it to finish to graduate… My Gsm Sim800L version is not connecting to network . The module will power up but it will blink 7 times and will turn off and suddenly it will turn on again and continously… Can you plese help me? And send the full code of AT commands needed? I very thankdul if you help me