Thank you very much for sharing your experience. It’s good to see shares like this 
I am working on a project using SIM900 GSM Module and UNO, but came across a problem.
My UNO is automatically getting Resetting, don't know Y??
Worked like Cham in the start.
Ultimately, what I understood is, Problem is due to flooding of RAM (exceeding RAM’s capacity),
Now my file size is around 16.5K. In my application stored few Contacts as Strings in the code. Reason for the file size.
Need help my Project is not working.
My doubt is How much RAM is this library is using and are there any other Library’s which consume less amount of RAM?
Thank You.