2.8" TFT Touch Shield for Arduino We've discontinued this version of the shield (which was expensive and difficult to make) and replaced it with a version 2: its got a better price, uses way fewer ...

This library is designed to work with the Arduino IDE versions 1.8.x or later; we have not tested it with earlier versions. This library should support any Arduino-compatible board, including the ...

[James] states the problem is a tantalum capacitor used to decouple the GSM radio power supply from the main Arduino supply. Tantalum capacitors are great for their low ESR properties.