Arduino GSM Shield

Dear

i am facing an issue while using the Arduino GSM Shield SIM900 and NEOWAY M590e

Kindly send me how to connect it to the arduino UNO or MEGA2560 with the libraries and codes needed in order to be functional.

Thanks

Are you saying that you are using TWO GSM modules on your Arduino UNO?!?

The SIM900 is a GSM module. The NEOWAY M590e is a GSM module.