Nearly everyone has a mobile phone nowadays. The convenience of being in constant contact and being able to do everything from send an email to play high end games means that most people go for a smart phone. And smart phones are expensive. If you want a real, top end mobile with all the newest features, you're looking at spending over five hundred pounds. But not all top end phones are created equal. If you're spending that amount of money, you want to make sure that what you're getting is worth it, right? Today we're talking about the specs you should look for on a top end mobile. So if you're in the market for the best that you can buy, then here's what you should be looking for...

Screen Size...

Screen size is probably one of the most important things in a new mobile. The size of the screen makes for a better viewing experience, whether you're watching a video or reading a web page. But it also makes for more comfortable typing. Since most top end smart phones come without a physical keyboard (which allows manufacturers to make screens that much bigger) you're going to be typing on screen. And the bigger the screen, the better you can type. On a top end model you're looking for a screen of around five inches. You can get away with 4.8 inches, but five is really what you should be aiming for.

Screen Quality...

The truth is that most screens nowadays have so good resolution and high PPI that you don't really need to worry about these specs any more. However, you might want to look for material. The Super AMOLED screens that are common on Samsung products are much brighter and clearer than older LCD or TFT LCD screens, though they might suck away a bit of battery power. And Apple's retina display, as seen on the iPhone 5, makes for a pretty nice viewing experience too. Don't worry too much about resolution and PPI specs, but look for a good material instead.

Processing Power...

The processor is your phone's engine. And the more processing power you have, the faster your phone will be, it's that simple. This is of particular concern if you like to keep lots of apps running at the same time on your mobile. Look for a minimum processing power (also known as CPU) of 1500 MHz (which might also be listed as 1.5 GHz), this will give you the power you need, though bigger is better in this case. Also be on the lookout for at least a dual or quad core processor, since it's going to be more reliable. We're seeing a lot more octo core processors too now, and you'll get some serious power with those.

RAM...

RAM is the memory that your phone keeps in reserve for performing everyday tasks, the more you have, the less likely your phone is going to be to freeze or crash. Plus, good RAM just makes your phone faster to respond to input. Look for at least 1 GB of RAM, and more is better.

4G Phones...

Yes, we want the normal kinds of connectivity, 3G, WiFi and Bluetooth, but we're also looking for 4G phones. 4G is the new standard for mobile internet and 4G phones get much faster internet speeds than older 3G models. In fact, they're around ten times faster, making for lightning-fast downloading and way better streaming of video feeds. Even if you don't have access to a 4G network quite yet, you will in the near future, so you want a 4G capable phone.

Internal Memory...

Internal memory is actually less of an issue than it used to be. With so many people storing their data, music and photos on the cloud and just accessing it when they need it, having a huge internal memory isn't necessarily a must have at this point. Having said that, most high-end models come with a minimum of 32 GB, and some with 64 GB. The absolute lowest amount of internal memory that you can get away with on a top end smart phone is 16 GB. Less than that and you're going to find yourself constantly deleting apps and messages to make more room on your phone.

Battery Life...

With such big and high powered screen becoming the norm on top end models, battery life has become an issue. Those screens are what leach most of the power out of your battery, so you want to make sure that you've got a good, strong battery to start with. You're looking at a minimum of fourteen hours of talking time per battery charge cycle. Stand by time isn't quite as much of an issue, since most smart phone owners don't leave their devices alone long enough for it to be a problem. But a decent battery is going to get at least twenty days of stand by time per charge cycle.

Branding...

There are brand leaders in top end smart phones. And as unfair as it may seem paying over five hundred pounds for a phone that isn't made by one of the top names probably isn't going to be a good idea. If you're paying that amount of money you want to look for an Apple, Samsung or HTC product. Possibly a Nokia product, especially if you're into Windows phones.

Operating System...

Everyone has their preferred phone operating system, so you're looking at version rather than type. If you're into Apple, you have nothing to worry about, since their top products all run the same version of iOS. On an Android phone you want at least Android 4.1 Jelly Bean. On a Windows phone you want Windows 8. If you're into Blackberrys, then the only top end phone worth looking at that runs RIM is the new Blackberry Z10. Basically, you're looking for the most recent incarnation of whichever operating system it is that you prefer.