I've used the solution for seven years. 

We've been using Trend Micro Mobile Security for five years. We are using the latest version.

I did my first deployment of Trend Micro in 2018 and my second deployment in February of 2019. 

I have been using Trend Micro Mobile Security for almost a year and a half or so.

I have been using this solution for ten years.

We implemented Trend Micro Mobile Security for a school, nine months ago.

More than nine months.

My first contact with Mobile Security was in 2013.