AYG3: What is major diference of AYG3 to other GSM Alarm

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Advantages of AYG3 GSM Alarm:

Claimed the most cost-effective GSM Alarm solution for home and small office use.
Newly released in 2010 with enhancements to shortcoming of old models. How? keep reading
Supported 3 levels of defense: 24 Hours always-on Arming, At-Home Arming and Away Arming.
More User-friendly. e.g. can use landline phone for configuration (not only SMS), clear indicators and audible signal so you know the response of panel.
Use Learning Coding method for learning the sensors