AT&T

AT&T will charge $20 per month for iPhone 4 users to take advantage of the iOS 4.3 Personal Hotspot feature. The carrier has confirmed that full support for the Personal Hotspot will debut when Apple released iOS 4.3 firmware on March 11, 2011.

The native Wi-Fi hotspot has been available on Verizon iPhone 4 models since launch in early February. The feature allows up to three devices to simultaneously connect to the iPhone's cellular data connection via Wi-Fi. Additional devices can use the connection via Bluetooth and USB for a total of five at once.

Hoping for a blazing fast 4G LTE compatible iPhone 5 to hit shelves later this year? Don't hold your breath. Although competitors to Apple's iPhone are already coming out with LTE phones, analyst Sam Greenholtz from Telecom Pragmatics claims Apple will wait for the iPhone 6 use the technology.

A report in The Street explains that Greenholtz has communicated with sources who say the LTE iPhone 6 is already under development. June or July 2012 is Apple's target launch date, which also gives carriers including AT&T and Verizon more time to roll out their LTE networks to full capacity.

After recently adding 3G streaming support, Sling Media has updated their SlingPlayer mobile iOS app again. Version 2.1 adds component cable video out support on the iPhone 4 and iPad when streaming in HQ mode.

This feature makes it possible to watch your favorite shows and other SlingPlayer media on a television right from your mobile device. SlingPlayer Mobile 2.1 also includes several bug fixes to improve stability and app operation.

Apple has released detailed support information explaining the differences between iPhone calling features on the AT&T and Verizon networks. Because AT&T Mobility uses GSM technology and Verizon Wireless has a CDMA network, each iPhone 4 has different calling capabilities. Recently it was revealed that Verizon's network suffers from conference calling limitations, but there are other differences as well. The table below was released by Apple to illustrate the details.

AT&T must be feeling the heat when it comes to the upcoming Verizon iPhone. Without exclusivity the wireless company will find itself competing for every last iPhone customer in the US. Verizon made waves when it announced that the CDMA iPhone would offer a personal hotspot for up to five Wi-Fi devices.

AT&T is set to follow suit and has announced that it's working with Apple to bring the feature to the iPhone with iOS 4.3. Developer beta versions of the next generation firmware have indicated the personal hotspot is indeed on its way.