SIM800 Raspberry Pi interface - Firmware update not working

Hi Ravi, two days ago i wath this video:


and i was interested for the information of the tutorial, and i make all process of the video, and update good all, but when i conect the sim800 rpi gsm add v 2.0, cant use bottom power, and the raspberry dont comunique with sim shield , please help me, i need help with this becuase is part of my tesys of ingenier …
https://www.modmypi.com/image/cache/data/rpi-products/breakout-boards/itead/DSC_0511-536x408.jpg

Hi @Henry_Saa,

What exact problem you are facing with RPi? There is no response for AT commands?

Did you try normal AT commands using a terminal interface with a PC before connecting to Raspberry Pi?
First verify if module AT commands are working and then ring to the module to see if it has connected to network. Then proceed to Raspberry Pi connection.