Allegedly, some iPhone models are under testing phase with LTE while AT&T is installing 4G LTE equipment in a major Apple store, both pointing towards the birth of an LTE-enabled iPhone in the near future.

Monday, BGR claimed in a report that Apple's carrier partners are testing iPhone models with LTE capability, confirmed by evidence of an internal iOS test build from one of Apple's major carrier partners, with a property list for LTE buried in the firmware.

Tuesday, Engadget revealed a spy shot of alleged 4G equipment installed in a major Apple store, from an anonymous source. The photo is claimed to show equipment capable of supporting the 700MHz and AWS bands AT&T plans to use for its LTE network.

The source told Engadget that Apple Stores in the region are attempting to increase staffing on the sales floor by around 30 percent. The timing may hint the expected heat over the next iPhone.

Could it be the buzz king iPhone 5 that will sport 4G? While expectation mounts, the given information offers no specific indication that the iPhone 5, or whatever device Apple is rolling out, will carry 4G network.

LTE, which stands for Long Term Evolution, has become the major focus for most mobile phone companies. It's billed as the speediest wireless connection and the current future of the industry.

AT&T plans to roll out its 4G network to 70 million customers in 15 markets within 2011. The carrier said on Tuesday that its first 4G devices will arrive in stores on August 21.

Even with those markets, AT&T would still lag far behind Verizon Wireless. Verizon's 4G LTE is already in 77 markets and the company expects to be in 175 by the end of the year.