GSM shield

Hello Everyone. 

I have a netduino Plus 2 and want to use a GSM shield with this. Can anyone recommend a good one? I have tried this stuff in the past but it is difficult to get the SIM chips setup to log into the a network. 

They require seting up a user pin  "****" of four numbers and all kinds of stuff to setup the SIM chip for the first time.

Does anyone have a step by step for this? If I am able to setup the SIM chip and the shield, I can do some demos of the possibilities. 

Please let me know soon. I have one modem but I do not have the model number with me to list it. I got it on the Arduino website. I hope that it is compatible with this Netduino.

I also have another question. Suppose I wanted to make a product? How would I get the code ready for manufacturing? Once I prove the concept and want to use .NET how hard would it be at that point? The goal is to create my own thing.

Thanks

Hi EagleSparrow,

I have used the 2.5G shields from SeeedStudio

https://www.seeedstu...3.0-p-2333.html

and 3G shields from 

https://www.itead.cc...-3g-shield.html

with a Netduino to initiate calls, send SMS & make http posts.

Voice call & SMS info

https://blog.devmobi...-for-code-club/

HTTP post info

https://blog.devmobi...odem-http-post/

Just need to make sure the shields you use are compatible with local network frequency bands etc.

@KiwiBryn

blog.devmobile.co.nz