87.7% of Android devices vulnerable to hackers
thememo.com
thememo.com
paying someone to put CM12 on it/firewall your baseband to data-only - $100
VoIP account that allows for zRTP - $120/year
Asterisk or Yate vps on seychelles cloud server - $200/year
Account with Cryptostorm.org for VPN - $100/year
Paying a Nerd to Configure your phone and PBX to work with all of the above - $200
The above is NSA Grade Security.
Total First-year cost: $840
Recurring Cost each year thereafter: $420