I want to implement M2M module, such as the Embedded SIM, to my wearable device. But to be honest, I have no idea what to do for this. I mean I know that I can use the module and write the driver or something. But I know nothing about the normal procedure for developing such M2M device. Would someone kindly tell me something about this? Or send me a link that generally talks about this. Thank you so much.
what kind of device do you have?
if it is a device which has communication port i think you can use fastract xtend modems insead of modules. If you do not know much about implementing M2M, i think it is easer to use a ready unit like xtend modems.
if you need to implement the m2m module inside your device, you will need your processor to talk with module with AT commands.
i do not know hardware detail of integration. may someone help finding a guide document for you
Hi Nathan,
Welcome to the forum, a wearable device, sound interesting. 
On top of zafer’s comment, I think you should check the product brochure for info of available products, for example:
http://www.sierrawireless.com/en/productsandservices/AirPrime/Wireless_Modules.aspx
http://www.sierrawireless.com/en/productsandservices/AirLink/Programmable_Modems.aspx
Understand you need embedded SIM, but I believe there are physical concern as per wearable device, i.e. form factor, hardware interface, power consumption.
And also software interface, network technology(2G/3G/LTE), whether you use external processor or Open AT Application framework (http://www.sierrawireless.com/productsandservices/AirPrime/Application_Framework.aspx to eliminate the needs for external processor.
You can check with your local distributor when your decision made or you can ask for their advice.
http://www.sierrawireless.com/productsandservices/AirPrime/Wireless_Modules/Embedded_SIM.aspx
Hope this helps and good luck.