Data Visualisation: How are people switching between networks?

Ken’s Tech Tips graphically visualises how UK punters have been switching network and finds out who the winners and the losers are.

In this study, Ken’s Tech Tips polled more than 6,000 people over a 2 month period to find out how they’re switching mobile network. We’ve visualised this data to look at the net movement of customers from network to network. Our graphs show which networks are losing customers, which networks are gaining customers and where the customers are coming from.

Background Information

For this visualisation, we polled 6,145 people through our PAC Code Finder tool between October 20th 2010 and December 19th 2010 (the same data set used in our “Ken’s Tech Tips Index” study of network performance).

Respondents were asked to “select your current network provider and the network that you wish to move to” from a drop down menu of 9 mobile networks: 3 (Three), O2, Orange, T-Mobile, Vodafone, ASDA Mobile, Giffgaff, Tesco Mobile and Virgin Mobile. These 9 networks form our study.

From the 9 networks, we took each pair of networks in turn. We looked at the “net movement” of customers between each pair of networks and have visualised it in the graph below. For example, if 200 customers switch from Network A to Network B and 100 customers switch from Network B to Network A, the “net movement” of customers would be 100 customers from Network A to Network B. This would be represented by a line pointing from Network A to Network B in our visualisation.

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Ken’s Tech Tips Index: How did the networks do in the run up to Christmas?

In our latest study into the performance of each network in the run-up to Christmas, Tesco Mobile takes the title of the best performing network followed by Three and T-Mobile.

What is the Ken’s Tech Tips index?

The Ken’s Tech Tips Index is our regular study looking into how well each mobile phone network is performing in terms of attracting new customers and retaining existing ones. We polled 6,145 people through our PAC Code Finder tool on their intention of switching network. From the answers, we determine how rapidly a network is gaining new customers and losing existing ones. The Ken’s Tech Tips “index score” is “the number of customers who join a given network for every 100 customers who leave that network”.

If a network has a high score in the Ken’s Tech Tips Index, it means they are gaining customers a lot faster than they lose them. This is perhaps a good indication that the products they provide are better value for consumers (or alternatively, it could just mean they are doing a great job with publicity or sales).

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HTC Desire HD Android Smartphone: Reviewed and Compared to HTC Desire

HTC’s new Desire HD smartphone aims to build on the success of the original HTC Desire. We review and compare the two phones.

After the success of the original HTC Desire, HTC have been trying to take it to the next level with their new flagship HTC Desire HD. Sporting a larger screen, a higher resolution camera and various software enhancements, does the Desire HD do enough to improve on the original phone or is it simply a small incremental upgrade? In this article, we review the Desire HD and take a look at some of the key differences between the Desire HD and the original Desire.

What’s the overall verdict on the Desire HD?

We love the HTC Desire HD for much the same reasons that we loved the HTC Desire. Both phones are well designed, are comfortable to hold and have a good build quality.

The software on the phone is fantastic – the Desire HD has Android 2.2 (Froyo) including free turn-by-turn GPS navigation and access to over 100,000 applications through the Android Market. The Desire HD’s large 4.3-inch screen makes it particularly well suited for the Google GPS navigation service which also features information about current traffic conditions.

On top of the stock Android, HTC have also added their proprietary “Sense UI” overlay which adds integration with social networks such as Facebook, provides the iconic home screen and links with the HTCSense.com website. The Desire HD, like the original Desire, is an absolute joy to use.

Our only criticism is the battery life. Providing the Desire HD is charged each night, our phone would usually make it through the day OK. However, sometimes it got a little too close to comfort… especially when we would use the phone in a low signal area or make heavy use of the multimedia features. Bizarrely, even though one of the main complaints about the Desire was battery life, the Desire HD has a smaller battery capacity (1230 mAh) than the original Desire (1400 mAh). HTC justify this by claiming the Desire HD’s hardware is more energy efficient – but we wonder why HTC couldn’t have used this to extend the battery life rather than as an excuse to reduce the battery capacity.

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Reviewed: Samsung Galaxy Tab Android Tablet – How does it fare against iPad?

The Samsung Galaxy Tab is a 7-inch Android tablet which has been dubbed the “first true competitor to the iPad”. Find out how the Tab fares in our detailed review here.

It might be a bit of an understatement to say that the technology enthusiasts across the world have been eagerly awaiting the launch of the Samsung Galaxy Tab and the chance to pit it against Apple’s iPad. Being the first Google-approved Android tablet on the market and the first mass-market 7-inch tablet device, the Tab gives us a taste of what might lies ahead in the tablet market and whether Android can take on the mighty Apple.

In this article, we’ve got a comprehensive review of the Galaxy Tab. We’ll look at the hardware, the practicalities of using it as a day-to-day device and phone and review some of the built-in applications. Along the way, we’ll look at the debate about the optimum size for a phone/tablet and find out whether the Tab works as a mass-market consumer device.

Our review is based on a final consumer release version of the Galaxy Tab provided to us by Samsung.

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Ken’s Tech Tips Index: Tesco Mobile, Three on the up whilst the big four lose out

Our first study of switching intention finds that Tesco Mobile and 3 are doing well in the market whereas the big networks are falling behind.

What is the Ken’s Tech Tips Index?

The Ken’s Tech Tips Index is our first study looking into how well each mobile phone network is performing in terms of attracting new customers and retaining existing ones. Using data from the PAC Code Finder tool and people’s stated intention of how they’ll switch network, the Ken’s Tech Tips Index answers the question of how rapidly a network is gaining and losing new customers. More specifically the index score is “the number of customers who join a given network for every 100 customers who leave that network”.

If a network has a high score in the Ken’s Tech Tips Index, it means they are gaining customers a lot faster than they lose them. This is perhaps a good indication that the products they provide are better value for consumers (or alternatively, it could just mean they are doing a great job with publicity or sales).

A score above 100 in the index means that network is gaining customers faster than it is losing them. Meanwhile a score of below 100 is bad news: it means the network is losing customers faster than it can replace them.

There are two ways by which a network can improve their Ken’s Tech Tips Index score. They can either attract more new customers or they can better retain their existing customers. The ways by which a network can do this is to provide better value to consumers, better customer service and support and a better customer experience.

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Reviewed: Samsung Wave & the Bada Operating System

We review the first Samsung Wave, the first phone running Samsung’s new bada operating system.


It takes a lot of guts for a company to decide they still want to develop their own smartphone operating system when the market is already saturated with the likes of iOS (iPhone), Android, Windows Phone 7, Symbian, Palm webOS and Blackberry OS. With these mobile operating systems fighting hard for market share and the open-source Android being adopted by numerous phone manufacturers including HTC, Sony Ericsson and Samsung themselves, Samsung’s decision to develop its own operating system, bada, was a gutsy and risky move.

Samsung recently gave me a new Samsung Wave S8500 handset to play with (see the disclosure notice at the end of this article). Available free on Pay Monthly tariffs starting from £25/month, it’s the first phone on the market running on the bada operating system and I was hoping it would have given me a taste of what’s to come from bada. Unfortunately my experience was incredibly disappointing: bada lacked many of the features that you would expect from a modern smartphone, many of the bundled applications failed to work and there were some serious usability issues.

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How to see the invisible infrared world using your mobile phone camera

Using your mobile phone, you can see infrared radiation – a normally invisible part of the electromagnetic spectrum. Ken’s Tech Tips looks at some of the physics of electromagnetic waves and explains how you can see this invisible world – and you don’t need anything more than the mobile phone in your pocket.

What is infrared radiation?

Infrared is a form of electromagnetic radiation. Other forms of electromagnetic  radiation (EM radiation) include visible light, x-rays, microwaves (the EM waves that wi-fi networks use and also the waves that cook your food in microwave ovens) and radio waves. The difference between all these different forms of radiation are the wavelength of the EM wave. We can illustrate this electromagnetic spectrum (CC-licensed image from Wikipedia):

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Contact

If you’d like to get in touch with me, you can send me an e-mail on ken at kenstechtips.com.

How Can I Help?

Looking to get in touch with a specific mobile or broadband provider?
(e.g. to change or cancel your plan)
Unfortunately, I’m just an third-party blogger and I operate independently of the mobile networks and broadband providers discussed. I therefore won’t be able to help you with any account-specific queries: you’ll need to direct this to the provider themselves. Due to data protection, please do not send me any of your personal information such as your account number, address, PAC Code, etc.
Found an error or an omission on the website?
Sometimes, I’ll get things wrong (or things can change quickly, given the industry we operate in). You can either leave a comment below the relevant article to let me know, or you can send me an email using the address above. Thanks again for taking the time to letting me know!
Got a question that you’d like answered?
Unfortunately, I’m not able to answer questions via e-mail due to the large volume of messages that I receive. However, you can leave a comment below the relevant article with your question. I’ll endeavour to reply to as many of those questions as I can, or other members of the community might chip in and answer them as well. If you like, our system can also send you a email notification whenever someone replies to your message.
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Effect of Microwave Ovens on Wireless Internet

The New Cook
Creative Commons License photo: Joshua Davis (jdavis.info)

I noticed something quite odd lately – when the microwave oven in my house was being used, I would lose all connectivity on my wireless internet connection. That lead to the internet dropping out in the whole house – internet radio, game consoles, laptops, etc.

It turns out that the issue is that microwave ovens and wireless internet operate on the same frequencies. My microwave uses a frequency of 2450MHz (check the back of your microwave as yours may be different) and my wireless (802.11g) operated on channel 11 (around 2462MHz). As you can imagine, the microwave oven outputs with a lot more power than the wireless router so totally overwhelms your ability to use wi-fi.

The solution is to change the frequency that your wireless internet operates on.

Firstly, check the back of your microwave oven and find out what frequency it operates on.

Now you’ll want to change the frequency that your wireless internet operates on. As a rule of thumb, you’ll probably want it to be at least 20MHz different from your microwave. As my wireless was operating at 2462MHz, it was well within the frequency range which was susceptible to interference from the microwave.

Modulazione di frequenza
Creative Commons License photo: Un ragazzo chiamato Bi

Here are the wi-fi channels and corresponding frequencies:

Channel Frequency (MHz)
1 2412
2 2417
3 2422
4 2427
5 2432
6 2437
7 2442
8 2447
9 2452
10 2457
11 2462
12 2467
13 2472
14 2484

It’s important to note that these are center frequencies. In other words, your wireless internet will use a range of frequencies around that frequency (e.g. channel 11 is centred on 2462MHz but actually uses all frequencies between 2451MHz and 2473MHz). Hence you need to make sure there is a sufficient gap between the frequency of your wireless internet and the frequency of the microwave. Consult this graph on Wikipedia for more information.

Check local laws too about what frequencies and power levels you are allowed to use. You can use channels 1-13 in most of the world with the exception of channels 12 and 13 in North America.

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