OWA for Iphone and international calling card

Question

Hello,
I work as the Supervisor for a company that has just purchased many iphones.  The group that is in charge of email at my company will only allow "OWA for Iphone" to be used because in this way, nothing is downloaded to the device.  All email, calendar entries and contacts/people entries are web based.  Because nothing is downloaded to the device, the Iphone app for any international calling card company like Reliance or True Roots will not work.
When I say, "will not work" this is why.  All international calling card companies apps that I have found, access the local downloaded contacts on the Iphone itself.  I have not found any that can connect to the people in the  "OWA for Iphone" app to make international calls for cheeper prices.
Is there an international calling card company whose app will work with "OWA for Iphone" and not the locally stored contacts?  Or one that I can make the choice, choose the contacts from the local Iphone and or people in the "OWA for Iphone" app?

Answer 1

International calling apps allow you to call an entry from your contact list.  When you make a call from your device using this International calling app it will hang up, dial a 1 800 or 1866 number, then redial the international number you dialed and complete the call.  This allows you to call for example, India for $.06/minute instead of $.50/minute or what ever your provider charges you.  It basically make it so your international calls go through your international calling app provider instead of your phone provider.  You still use your phone provider minutes, but the cost is rerouted to your international calling provider/partner.
1. I know, its so hard to do anything.  Yes all smartphones (Iphones, Androids, Windows, etc...)  The email admins will not allow anything to directly download to the device from the company.  The OWA for IPhone app uses the web browser but changes the view of the email to look and feel user friendly.  Basically, OWA for Iphone is using the web to look at all email, contacts, and calendar entries.
2. The international calling app (Reliance and all others I have found including Skype) will only look at local downloaded contacts.  Because we are using OWA for Iphone there are no downloaded contacts. So, the international calling app does not see the contacts to be able to call.
If I go into OWA for IPhone and go to People and call somebody internationally +44 XX XXX XXXXX it works fine, but the international calling app does not activate becasue the app can't see the number.  This is because its looking only at the local downloaded contacts list, not the contacts on the web using OWA for Iphone