The day is finally upon us! Today, Apple will make its much anticipated announcement about the newest set of iPhones. Few the past few months there has been plenty of healthy speculation that Apple will be launching the iPhone 5 tonight, but the closer we get to the actual event, the more we're starting to think that there might be a little surprise in store. We think that there could be an plucky intruder on the iPhone 5's party, in the shape of a iPhone 4S.

Before you get your hopes up about the iPhone 4S being a massive step forward in mobile technology, it's worth bearing in mind that when Apple announced the iPhone 3GS a year after the iPhone 3G was released, the only significant upgrades were a video camera, an inbuilt compass and an improved processor. So let's take a look at what the iPhone 4 can currently do and with a clear-head examine all the iPhone 4S rumours that are currently doing the rounds on the World Wide Web.

Improved memory (64GB)

The German's have the positive stereotype of being an efficient race who get things done without any fuss. So when one employee of Vodafone Germany got wind that the iPhone 4S will be available with 64GB of storage, the inbuilt efficiency of the employee blocked out any thoughts about an Apple embargo and the Vodafone website was duly updated to include the iPhone 4S. If there is any truth behind an iPhone 4S launch tonight, then improved storage space is bound to be high up on the wish list of iPhone fans.

Apple are going downmarket

Rumours give with one and and take with the other, it seems. As some websites claim to have scooped the news that the iPhone 4S will actually be a lightweight version of the iPhone 4. This rumour is an interesting one because if there is one thing you can say with 100% confidence about iPhones, it is that they are not cheap. The reputable news service Reuters claims that it has had information from two separate sources who both involved in Apple's supply chain that an 8GB iPhone is on the cards.  

Integrated SIM

The idea that Apple have plans to turn the iPhone in to a device that has an integrated sim have been steadily growing for months now. The benefits of having a 'designed for' Apple SIM are obvious, as it will surely produced faster and better operation of the iPhone 4S. However it's also been rumoured that one of the iPhone's major retailers here in the UK, Orange, is simultaneously developing a new microSim specifically for the new iPhones. Little solid evidence has been produced to suggest that an integrated SIM will be included in the new iPhones though.

Improved camera

One rumour that keeps popping up all over the web is that the iPhone 4S will improve the spec of its predecessor's camera. Reports that the iPhone 4S will come equipped with an 8MP camera  have been constantly appearing wherever we look, as well as the news that  it will come with a much improved separate LED flash.

Will support both GSM and CDMA

This is only really relevant to the US market, as here in the UK we only have GSM. Code division multiple access (CDMA) is an alternative frequency that that certain American phone networks use to transfer data. In the past, the iPhone has had to release two separate models, one for GSM and one for CDMA. With both frequencies included in the iPhone 4S, Apple, and more importantly, the retailers, now only have to stock one version on the iPhone. What it means for UK consumers is that when travelling to American, we now have greater freedom over which network to choose while roaming. Never a bad thing.

The iPhone 4S is covering for the iPhone 5

Rumours that the iPhone 5 will be slimmer than the iPhone 4 are so plentiful, that they are pretty much a given now. However, because Apple are set on making the iPhone 5 a slimmer device, they have run into overheating problems. The rumour from a number of various sources, claim that Apple originally intended to squeeze a dual-core A5 processor in to the iPhone 5, but ran into problems when it started to overheat. The rumours go on to say that Apple have been forced to wait until the smaller A6 processors are ready in early 2012, before they can release the device.