Apple has released iOS 4.1 Beta 2 (build 8B5091b) and SDK (build 10m2305a) for iPhone 4, iPhone 3GS, iPhone 3G and iPod Touch 2G, 3G. Just like iOS 4.1 beta 1, this build of iOS is available for developers only, so if you have a registered Apple Developer account, you can download the update by signing into iPhone Dev Center.

Apple has delayed White iPhone 4 launch yet again! After iPhone 4 was launched in June, Apple announced that white iPhone 4 will ship in the second half of July due to some manufacturing issues and in a recent press statement, Apple has again announced that there shall be further delay in white iPhone 4 launch. Phone shipping has been delayed until later this year.

According to recent tweets by Comex, man behind the famous Spirit tool, the next version of Spirit will jailbreak iOS 4.0 and iOS 4.0.1 on all iDevices. If you are on iOS 4 or iOS 4.0.1, all you need now is to save your SHSH blobs so that you can downgrade to older firmware versions in future. SHSH blobs for iOS 4.0 and 4.0.1 are same as the only difference is the size of signal bars.

Previously, @planetbeing (member of iPhone Dev-Team) showed his unlocked iPhone 4 with Ultrasn0w and now another member of the team @MuscleNerd has confirmed that he has successfully unlocked his iPhone 4 with Ultrasn0w. @MuscleNerd showed a picture of his iPhone 4 camped on T-Mobile’s network.

Dev-Team’s quest for unlocking iPhone 4 continues. Dev-Team has posted a new article on its official blog titled ultrasn0w is growing!. The article states that they have successfully accomplished carrier unlock on iPhone 4 with Utlrasn0w tool and they are now in the process of fine tuning the tool for public release.

GeoHot is in the spotlight again! The jailbreak genius has posted a new post on his blog showing a jailbreaked iPhone 4 running Cydia. He already showed us the ground work he has done for jailbreaking iOS 4. GeoHot in his recent article also confirmed that limera1n and pwned4life are not his tools/softwares, these are just some arbitrary names given by bloggers to his efforts.

iPhone 4 white edition was supposed to be shipped after mid July due to some manufacturing delays, but a Japanese website already got hold of an iPhone 4 white. Website has shared many high resolution photos of phone. White edition of iPhone 4 has a high public demand, many iPhone users are anxiously waiting for its shipping date to arrive.

iPhone 4 issues misery continue. We already know about iPhone 4 signal reception defect, now there is another dangerous issue reported! As per a report by BGR, iPhone 4 caught fire and burnt while being charged with its standard USB cable. This issue was brought into notice by a AT&T customer who showed a burnt iPhone 4 along with its melted USB cable to AT&T customer care center.

If you are expecting that the next iOS update will fix your iPhone 4’s signal reception issue then you are out of luck. Apple has confirmed that the signal reception issue in iPhone 4 is hardware related and the next iOS update will not fix the problem but will only change the way (accurate) your iPhone 4 will display the signal strength.

Erica Sadun, an iPhone developer, has created a pretty simple and handy application for measuring iPhone 4 signal strength and variation. The application show three signal indicators, each indication the real time signal reception on iPhone 4.