If you intend to use your GigSky Data SIM card in your smartphone while you are traveling, you have to address the issue of how to make and receive the calls that you would otherwise have made and received using your service provider's SIM card. The easiest way to do this is with a VoIP application, for example, Skype.
The way I have implemented this for my device is as follows.
1. I purchased a Skype Number. This is a number that, when called, rings your Skype account, regardless of which device the Skype application is open on. There are a number of features and ways this can be used, such as purchasing a Skype number in each country from where you expect to receive lots of calls, reducing costs for your callers. For now, I'm going to concentrate on how to use this to replace your mobile phone when using our data SIM card. A Skype Number costs either $18 for 3 months or $60 for 12 months.
2. I set the Caller ID of my Skype account to be my mobile phone number. This is so that any calls I make from Skype will appear to come from my mobile phone number. Skype takes up to 24 hours to complete the verification of this, by sending an SMS to the mobile phone number you entered, so don't leave this till the last minute before traveling.
3. I set up Call Forwarding on my mobile phone so that it forwards to my Skype Number. Now, anyone calling my mobile phone number will be forwarded to my Skype number. If I can't answer for any reason, the call will be directed to my Skype voicemail, which was activated automatically when I purchase my Skype Number.
And that's it. All calls to my mobile phone will route to Skype, and all calls from Skype will look as if they came from my mobile phone.
As an approximate guide, Skype says that the following are examples of typical data usage:
- Skype-to-Skype calls: around 750kB for one minute of calling
- Calls to mobile numbers or landlines: around 150kB for one minute of calling
- Video calls between two mobile phone devices: around 4MB for one minute of video calling
- Video calls between a mobile phone and a computer: around 4.5MB for one minute of video calling