AON - Final draft
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AON - Final draft

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AON - Final draft AON - Final draft Document Transcript

  • Page 1 of 6 In this project I am going to compare the cost of a number of mobile phones from two different retailers, ‘Phones 4 U’ and ‘Carphone Warehouse’. In this I will be gathering information to decide on the most suitable phone and contract. I will be working out the average costs for the different phones and price plans, considering whether the mean, median or mode gives the most realistic result. I will use a pie chart to work out and show my personal phone usage and a formula to calculate the cost of at least two different price plans over the course of an average contract length which is 24 months. Finally I will decide which phone and price plan would be best suited to me. How mobile phones work In my research I found various charts that I have bookmarked on Diigo, such as a diagram showing how a mobile phone is able to communicate and access the internet wirelessly; All mobile to mobile calls have to go through a mobile switching centre, which is a service delivery node; this allows people to communicate wirelessly. This is also the same for accessing the internet via a smartphone. The mobile phone first sends information to a base station which in turn sends this through a mobile switching centre server using a fixed microwave link, which uses radio waves to transmit information. This allows access to the internet sending the information back to your phone. Here is a link to a diagram that explains this in a visual way: http://4.bp.blogspot.com/-oHcAJePeZ8o/T2sud_- dsyI/AAAAAAAAAI0/LTmm0mjFoG4/s1600/basic+cellular+network.jpg
  • Page 2 of 6 Specification comparison I compared 10 phones from the Carphone Warehouse supplement, ‘The Guide’ issue 2. Model Operating System Battery life Out of 5 Processor Speed Out of 5 Camera Megapixels Screen quality Out of 5 Screen size (inches) Blackberry 9720 Blackberry OS 7.1 1 1 5 1 2.4 LG Optimus L3 II Android 4.1 Jelly Bean 2 1 3.15 1 3.2 HTC Desire 500 Android 4.1 Jelly Bean 2 3 8 2 4.3 HTC One Android 4.1 Jelly Bean 2 4 4 4 4.7 Sony Xperia M Android 4.1 Jelly Bean 3 2 5 2 4 Blackberry Z30 Blackberry OS 10.2 3 3 8 3 5 Sony Xperia Z Ultra Android 4.2 Jelly Bean 3 5 8 5 6.4 Nokia Lumia 1020 Windows Phone 8 4 3 41 3 4.5 LG G2 Android 4.2 Jelly Bean 4 5 13 4 5.9 Nokia Lumia 1520 Windows Phone 8 5 5 20 4 6 As battery life and megapixels are both important to me I decided to filter these phones to show greater than and equal to 3 out of 5 for battery life and 8 for megapixels. I did this using the AutoFilter tool in Excel. Below are the results: Model Operating System Battery life Out of 5 Processor Speed Out of 5 Camera Megapixels Screen quality Out of 5 Screen size (inches) Blackberry Z30 Blackberry OS 10.2 3 3 8 3 5 Sony Xperia Z Ultra Android 4.2 Jelly Bean 3 5 8 5 6.4 Nokia Lumia 1020 Windows Phone 8 4 3 41 3 4.5 LG G2 Android 4.2 Jelly Bean 4 5 13 4 5.9 Nokia Lumia 1520 Windows Phone 8 5 5 20 4 6
  • Page 3 of 6 Price comparison Below is a table which consists of 5 different phones and tariffs from Carphone Warehouse: Phone Memory Cost of Phone Monthly Tariff Minutes Texts Data iPhone 4s 8GB Free £22.00 200 Unlimited 100mb iPhone 5s 16GB Free £42.00 Unlimited Unlimited 1GB iPhone 5c 16GB Free £32.00 Unlimited Unlimited 1GB Nokia Lumia 1020 32GB Free £37.00 600 Unlimited 750mb Next is a table that shows the same phones from Phones 4 U: Phone Memory Cost of Phone Monthly Tariff Minutes Texts Data iPhone 4s 8GB Free £27.99 1000 Unlimited 500mb iPhone 5s 16GB Free £47.00 Unlimited Unlimited 6GB iPhone 5c 16GB Free £33.00 Unlimited Unlimited 1GB Nokia Lumia 1020 2GB (with optional memory via an SD card) Free £42.00 Unlimited Unlimited 6GB Now that I have collected this data I will work out the mean, median and mode for all phones from both retailers: Mean Median Mode Range Monthly tariff £35.37 £35.00 £42.00 £25.00 As these pay monthly contracts include a free phone and unlimited amounts of minutes and data, working out the mean, median and mode wasn't entirely possible, though both the mean and median of the monthly tariff is useful as it gave me an estimated average price that I would be expected to pay per month.
  • Page 4 of 6 Mobile Phone Usage Now I will work out my estimated phone usage and represent this as a pie chart: During the daytime I am at work so my phone usage is very low I have a 15 minute break in the morning and a 30-60 minute break for lunch, though I do not always use my phone in these times so I added the 15 to the 60 to make 75, halving this then rounding it up to 40 minutes per day. In the evening I would say around 2 hours of my time may consist of phone usage including text messaging, phone calls and internet data. At the weekend is when I would use a mobile phone the most. So I estimated around 5 hours per day, meaning 10 hours over the 2 day period. This information would be useful if I wanted to buy a “Pay As You Go” phone as, unlike contract phones, I would need to pay for length of calls and data usage.
  • Page 5 of 6 Contract Cost Comparison Over the course of a 2 year contract where: B=Total Bill and T=Monthly Tariff ∴ B=24T Using this formula with a calculator I worked out how much a 2 year contract would cost and compared 3 of the mobile phones from both companies. iPhone 4s (Carphone Warehouse) T=22 B= 22*24= £528 iPhone 4s (Phones 4 U) T=28 (rounded to nearest £) B=28*24= £672 iPhone 5c (Carphone Warehouse) T=32 B=32*24=£768 iPhone 5c (Phones 4 U) T=33 B=33*24=£792 Nokia Lumia (Carphone Warehouse) T=37 B=37*24=£888 Nokia Lumia (Phones 4 U) T=42 B=42*24=£1008 Total bill (24 month contract) Percentages Cost Difference I then worked out the total bills as percentage difference and simple fractions: iPhone 4s Phones 4U = £672 Carphone Warehouse = £528 = (672-528)/672 * 100 = 264/672 * 100 = 0.2142857 * 100 = 21.428571% rounded down to 21% iPhone 4s is 21% cheaper at Carphone Warehouse (or approximately one fifth cheaper = 1/5) iPhone 5c Phones 4U = £792 Carphone Warehouse = £768 (792-768)/792=0.030303 *100=3.030303 =3.03% rounded down to 3% difference iPhone 5c is 3% cheaper at Carphone Warehouse (or one thirty-third cheaper = 1/33) Nokia Lumia Phones 4U = £1008 Carphone warehouse =£888 = (1008-888)/1008 * 100 = 120/1008 *100 = 0.11904761 = 11.904761% rounded up to 12% Nokia Lumia is 12% cheaper at Carphone Warehouse (or one eighth cheaper = 1/8)
  • Page 6 of 6 Conclusion Overall I have concluded that Carphone Warehouse is cheaper than Phones 4U in every case, when buying a contract phone. The Nokia Lumia 1020 would be more beneficial as it has the capacity to increase its memory size via SD card and also has a far superior camera. However this is the most expensive option at £2 per month more than the average. The iPhone 4 would be the cheapest option and would work collaboratively with my iPad and any existing in app purchases which would mean I would not have to pay for them again as with the Nokia Lumia 1020 which is Windows based. However for iPhone 4 is only available with 8GB of memory. Which means the phone of choice would be the iPhone 5c as it has 16GB which should be enough memory for a decent amount of apps, photos and songs and is still cheaper than the average by £2 per month.