Tags in vTiger are a very useful and powerful tool that many users might have missed exploring. vTiger 7.x has an enhanced and much more effective tagging feature.
The CRMTiger team successfully completed SMS confirmation from a specially assigned user. The USA-based company is a service provider for car and home lock repairs, with their technicians network across the US and Canada. They were using an app built on MS Access in their internal network with limitations about capabilities and scalability.