Examples ToP   i  Kom
 
The Landline Scenario (1,2 ¢/min*)
I am in my home country and I have an unlimited data plan and do not have to pay for Roaming:
I use ToPiKom on my iPhone to call from my home or office landline to a landline in Germany, Australia, Spain, Singapore etc.  (check VoIP rates with your provider)
COST:     5 cent per call no matter how long!
                + 1 cent/minute
The Mobile Scenario (3,2 ¢/min*)
I am in my home country and I have an unlimited data plan and do not have to pay for Roaming:
I use ToPiKom on my iPhone to call from my iPhone to a landline in China, France, Spain, etc.
COST:     5 cent per call no matter how long!
                + 3 cent/minute
The European Roaming Scenario (5,8 ¢/miniPhone or 1,2 ¢/minlocal-landline*)
I am roaming in Europe and have to pay for Roaming:
I use ToPiKom on my iPhone to call from my iPhone to a phone in USA, Australia, Spain, etc.

COST:     5 cent per call no matter how long!
                + 3 cent/minute ( or cheaper if you use a local phone instead of your iPhone)
                + 63 cent per call up to 59 minutes roaming (or as low as free if you use a local landline phone
                 instead of your iPhone; for roaming rates see your contract)
                + approx. 15 cent per connection for data roaming
The Global Roaming Scenario (64 ¢/miniPhone or 3,2 ¢/minlocal-landline*)
I am outside my home continent (Ländergruppe 2) and do have to pay for Roaming:
I use ToPiKom on my iPhone to call from my iPhone to a landline in USA, Germany, Australia, Spain, etc.

COST:     5 cent per call no matter how long!
                + 3 cent/minute ( or as low as free if you use a local phone instead of your iPhone)
                + 41 cent per day + 58 cent per minute roaming (or as low as free if you use a local landline phone
                 instead of your iPhone; for roaming rates see your contract)
                + approx. 42 cent per connection for data roaming

The Fiji Roaming Scenario (157 ¢/miniPhone or 18 ¢/minlocal-landline or mobile*)
I am on Fiji (Ländergruppe 3) and do have to pay for Roaming:
I use ToPiKom on my iPhone to call from my iPhone to a landline in USA, Germany, Australia, Spain, etc.

COST:     5 cent per call no matter how long!
                + 3 cent/minute ( or as low as free if you use a local phone instead of your iPhone)
                + 41 cent per day + 150 cent per minute roaming (or 17 cent/minute if you use a local landline phone
                 instead of your iPhone; for roaming rates see your contract)
                + approx. 67 cent per connection for data roaming

When you are Roaming internationally make sure to disable Notifications and Push Services if you want to avoid high data volumes.
ToPiKom only uses typically 4 kB to 15 kB of data to initiate a call, depending on network conditions.
My iPhone Plan
I use an iPhone plan by T-Mobile Deutschland with free SmartTraveller option and one of the supported VoIP providers. (The following examples are tested using a Complete 120 plan along with a VoIP account with www.CallingCredit.com.) *The rates per minute are net prices calculated for a 30 minutes call. (2011.8.1)
About
ToPiKom is awesome if you want to talk from your iPhone, mobile, home or office phone to family, friends and business partners anywhere in the world. All you need is an iPhone, iPod touch or iPad, internet (3G,EDGE, GPRS or WiFi) and a VoiP account.
The following example rates are my individual rates and only meant to give you an idea at how low prices you can get in touch with the rest of the world wherever you are on this planet.
Please check your cell phone contract and VoIP provider for your individual rates.
*The rates per minute are calculated for a 30 minutes call.