I have bought a SIM900 shield for an ordinary Arduino Uno board. The problem is that it doesn't have long pins on the bottom side, making it impossible to click on mu Arduino Uno. The shield I have is this:
As you can see, there are identical pin spaces next to the red and yellow plastic female pin things. Can I just solder new pins in the free spaces and will it work like that? I notice that the yellow and red plastic female pin holders on my board are on the free spaces in this picture. I supposed I can just use the adjacent foles to solder long pins so I can use it for my Arduino?