Here is some excellent news for Brits who travel often to developing countries. One of the irritations of frequent travel is the ludicrous roaming charges imposed by mobile phone companies (file under #FirstWorldProblems). It is expensive to receive calls on your British mobile number when your travelling (because you have to pay the international call rate on the incoming call) as well as to make calls or send or receive texts.  The data costs when roaming are also extortionate.

Roaming charges within Europe are beginning to come down, thanks mainly to the EU, but it still costs an arm and a leg to use a British mobile in the United States or in most developing countries.

My usual work-around has been to use local Pay-As-You-Go SIM cards and leave my UK mobile switched off, so that it diverts to voicemail. A big disadvantage of this is that anyone calling or texting my UK mobile doesn’t reach me. (By the way, it is outrageous that there is no way to access my mobile phone voicemail, nor send and receive texts, over the web.)

The good news is that O2, a UK mobile operator, has released a new app called TuGo which seems likely to disrupt all that. It installs on your Android or iPhone, or your laptop. Anywhere you can get a wifi internet connection, you can use the app as if you were using your mobile phone in the UK. It can receive calls made to your UK mobile number, make calls from your UK number, and it can send and receive texts. All this comes out of the talk time and text allowance in your normal O2 contract, with no additional overseas roaming charge.

So for example, when travelling in Ethiopia you could put a local Pay-As-You-Go sim card into your smartphone (to make and receive local calls) and run this app (to make and receive calls and texts on your UK mobile number, using a wifi internet connection). Then you would have two phone numbers working simultaneously on your phone without the need for dual SIM. Provided you can get a decent internet connection – perhaps in a hotel or internet cafe – you would be able to sit in Ethiopia and make and receive calls as if you were in the UK, on your normal UK mobile number, with no roaming charges and no international call charges.


There are parts of this you can do in other ways. You can use Skype to make international calls; and if you have a Skype In number people can call you. You can use What’s App to send messages to other users of What’s App.  But I am not aware of any other solution that enables you to use your normal mobile number for calls and texts, anywhere in the world, without international charges, and without the people you are talking to having to do anything different.

Sadly I am not with O2 so I have not tried this.  Has anyone with O2 given it a go? I would be interested to hear how it works in practice.

Now that O2 have shown that this is possible, I cannot see how other mobile phone operators can avoid following suit. I asked Vodafone if they are planning to introduce a version of this app for their customers. I got an uncomprehending reply from customer support, saying that since the app is only for O2 customers, I won’t be able to use it. [NSS!] If Vodafone has not introduced a similar app by the time my contract expires, I’ll probably move my number to O2 to take advantage of it.


Owen Barder

Owen is CEO of Precision Agriculture for Development. He has worked in the office of the UK Prime Minister, the British Treasury, the Department for International Development; and at the Center for Global Development.


Habib Malik · August 22, 2013 at 2:55 am

Hi Owen
Thanks for sharing this. Well I am on O2 and these days I am in the field here in Pakistan so will try!

    Owen Barder · August 22, 2013 at 3:51 am

    Habit – Let us know how you get on. It would be great to hear if it works as described.


Erik Toft · August 22, 2013 at 5:31 am


And for those not in the UK or not on O2 I do this:
Have a Skype-in number in Denmark, forward my Danish number to Skype number when travelling, forward my Skype number to whatever number I’m using. This way I receive all calls.
There’s an app for on-click setting up forwarding.
Won’t do SMS though, I wonder how P2 do that.

Kees · August 22, 2013 at 10:24 am

Owen, have you seen Viber? It works, when online, with your usual phone numbers. To be on line you can use a mobile router with a local internet subscription or prepaid internet only sim in order to be also on line outside the WIFI environment of hotels etc. 

    Owen Barder · August 22, 2013 at 11:16 am

    Kees – Thanks. I don’t understand what you mean when you say that Viber works with your usual phone numbers. I thought Viber only worked if you connect to another Viber user? If someone dials the mobile phone number on my business card from their office telephone, will that ring on Viber?

    Also, I don’t see Viber handling SMS messages sent to my mobile?


Jake Anders · August 22, 2013 at 11:33 am

Saw a tweet to this post and thought I’d share my thoughts! I am an O2 customer and have used ToGo in this way (as well as within the UK, answering calls on my iPad when my phone battery died), which was extremely useful. I fully agree that it is a reason to be with O2, in my case tipping the balance away from leaving for a slightly cheaper offer elsewhere. I have has no problem with lag, and in some cases calls and texts come through to my iPad marginally before my phone!
Only problem with it is that the app itself is not the best designed in the world, feeling slightly clunky and not keeping calls and messages you have dealt with in sync across multiple devices with TuGo installed. A recent update suggests O2 are still working on it and definitely taking it in the right direction. In my view, the additional flexibility more than makes up for this minor annoyance.

Alex · August 23, 2013 at 10:21 am

The core service is a MVNO whose SIM comes with a pool of local phone numbers for each country where they have interconnection, so when you make an outbound call (or use data), they’re only paying local wholesale rates, and they can pass the saving on to you. If you want, and are willing to pay a bit extra, you can have an assigned local number in such and such a country.
The app adds to this by routing your calls over WiFi if available and of suitable quality, over mobile data if of sufficient quality and covered by their rates, or failing those, over the mobile voice circuit.

Pablo Rodriguez-Bilella · August 28, 2013 at 12:05 am

I´m just beginning to pay a look to CrowdRoaming…

Akansha · November 23, 2015 at 9:57 am

I liked the concept of Ajura. It is an international roaming app which works any where in the world. Awesome free app which requires only internet connection and it reduces 90% bills of international roaming charges. To know more about the app and how to download, visit:

Srishti · December 15, 2015 at 7:03 am

In my knowledge one and only one mobile application is there which helps you to avoid international roaming charges. Download Ajura an international roaming app, which makes your life affordable and simple! Once you download the app, you don’t need to purchase local SIM Cards. Here is the link for your reference:

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