Tag: iPhone 4

How To: Protect Your iDevice From PDF Exploits

For all those of you who have used the JailbreakMe.com method of jailbreaking then you took advantage of a PDF exploit in the Safari application. This is good that you can jailbreak your device so easily but it also means anyone with the right know how can run code on your iDevice. This means that if in the wrong hands it could be used for malicious purposes.

The iPhone Dev-Team or Apple will eventually patch the PDF hole, probably the latter. For now you need to make sure your device is protected so that you don’t fall into any malicious traps. You need to install a Cydia package called PDF Loading Warner, this package displays a pop-up when your device is about to open a PDF. It won’t stop this exploit but it will let you choose not to open a PDF that might be malicious. It has caused some issues with iBooks when opening PDF files as you have to dismiss the pop-up numerous times. However it’s a small price to pay for such an easy jailbreak.

FaceTime uses 3MB of Data/Minute

The folks over at 9to5mac have found that FaceTime uses just under 3MB of data per minute. To be able to use FaceTime over 3G you need to jailbreak your iPhone 4 and then download the My3G app from Cydia. Then you can ‘trick’ the iOS into thinking it’s on WiFi when it’s actually using the 3G cellular network. Obviously this has it’s upsides such as using FaceTime where ever you like or watching high quality YouTube videos on the go. Bear in mind if your using FaceTime on 3G then take into your bandwidth cap into consideration. On O2 in the UK currently most iPhone 4 users have a 500MB+ cap. So if your on the 500MB plan then you can use FaceTime on 3G for a total of around 2 1/2 hours a month, that’s just on FaceTime. So make sure if you are using FaceTime on 3G that you don’t use it too much.

The Return of the JailbreakMe.com Jailbreak

Back in the 1.x days JailbreakMe.com was the simplest way to jailbreak your device. And now comex and Dev-Team have released the latest userland jailbreak which exploits a PDF flaw in MobileSafari. This means you can jailbreak any iOS device, including the iPhone4 on the 4.x firmware. Because the exploit that was used it public I’m sure it won’t be too long until Apple fix the flaw and then a new exploit will have to be used. As always remember to backup your SHSH files so that you can restore to your current firmware and keep on using JailbreakMe.com in the future.

To jailbreak just open up the site JailbreakMe.com and then slide to jailbreak and then just wait. It’s that simple!

iPhone 4 Screen Issues

Today the iPhone 4 was launched in many countries however a few big problems have arisen. The first one being the retina display which on 1000’s of users iPhone 4 is showing a yellow tint in parts of the screen.

However there has been a follow up on this issue someone posting on the AppleInsider forums seems to know why:

Apple is using a bonding agent called Organofunctional Silane Z-6011 to bond the layers of glass. Apparently, Apple (or more likely Foxconn) is shipping these products so quickly that the evaporation process is not complete. However, after one or two days of use, especially with the screen on, will complete the evaporation process and the yellow “blotches” will disappear. How do I know? I was involved in pitching Z-6011 to Apple.
So if this is true then we might see this problem clear within a few days as if not Apple is going to have a huge problem, seeing as in a recent Engadget poll 55% of users said there screen had the yellow colouring issue, which out of a sample of 27,640 people is quite shocking to say the least. This isn’t the only issue of the day that is affecting users but the new revolutionary antenna system seems to be causing big issues with reception and dropped calls, although Apple says it doesn’t it’s just to do with how the signal is displayed.

iPhone 4 To Have 512MB of RAM

Apple are never open about the actual real specs of the iPhone. We know the iPhone 4 uses a A4 chip but we don’t know the clock speed but for Apple to keep up with todays competition it’s been reported that the new iPhone will have 512MB of RAM instead of the 256MB that the iPhone 3GS has. This will give a lot more head room for games, multitasking and other memory hungry apps.

This will also hopefully mean that for the jailbreak community that with the extra CPU speed and double the RAM that WinterBoard and other modifications will run a lot smoother and you can have a lot more complex themes.

iPhone 4 Might Be Able To Playback 1080p Video?

Apple’s official specs on the iPhone 4 state that it can run H.264 video up to 720p at 30 frames per second, Main Profile level 3.1 with AAC-LC audio up to 160Kbps, 48kHz, stereo audio in .m4v, .mp4 and .mov file formats. However if you remember back a few months it was shown that the 3GS could playback 720p/1080i video, although it was not officially supported, see related for the link. So this has made me think that due to the bump in CPU power, now that the iPhone is running Apple’s A4 chip that it should be able to playback full 1080p video.

With the extended battery and retina display, I can imagine that watching HD video on the iPhone 4 will be stunning but I can understand why Apple doesn’t include it official as it does save battery life playing 720p instead of full 1080p.

Also if you plug your iPhone 4 into your TV it would be a useful device to watch HD movies without the need for BluRay.

Related:
iPhone 3GS Capable Of HD (720p/1080i) Video

O2 Imposes 3G Data Limits for iPhone 4 Users

Similar to AT&T in the US, O2 has now put a data limit on pay monthly users. O2 had already put a 750MB limit of Pay As You Go users but have now changed there unlimited plans to have limited data caps. The cost for additional data isn’t that steap and for those who need it shouldn’t be that much of an issue but it opens up a competitive advantage to any of the multiple UK carriers who offer true unlimited data.