FYI (and a vent).
After travelling overseas with work I returned to an inflated mobile bill from slingshot. I followed all the SOP's for using cell phone overseas; turned off roaming data and checked the roaming charges for calling and text. Clearly stated on the slingshot web site 'US and Canada $0.80 per text' and every time I logged onto a new network I got the text directing me to the mobile pricing web page. Image my surprise when all my texts were charged at $1, being the level headed person that I am I quickly rage quit their service. After calming down from the approximately $5 overcharge I sent them an email outlining my frustration and was credited the overcharge... Still waiting for the explanation. So this is for all Slingshot mobile users to check your bill very carefully.

Feedback welcome.