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Computerworld - Apple could launch an iPhone this year that works on faster 4G wireless networks, but it would have to make financial and design sacrifices to do so, a research firm said today.

More likely, Apple will wait until 2012 to add support for long-term evolution (LTE) networks such as the ones operated by Verizon and being slowly rolled out by AT&T, said Tina Teng, a senior analyst with IHS iSuppli.

To create an iPhone that can access LTE networks this year, Apple would essentially have to take the same path as HTC and its Android-powered Thunderbolt, said Teng.

"Based on our teardown [of the Thunderbolt], if Apple is really going to release an LTE iPhone this fall, this is the implementation it would use," said Teng.

But the Thunderbolt sports the highest bill-of-materials, or BOM, of any smartphone iSuppli has torn apart --$262, closing in on the cost of a tablet -- and is significantly larger and heavier than the iPhone.

Both would be big stumbling blocks for Apple.

According to iSuppli, if Apple used the same first-generation LTE components inside the Thunderbolt for a 2011 smartphone, the device's BOM would jump by 23% to $211 because of the extra $40 necessary to cover the costs of the LTE components.

With Apple's fondness for high profit margins, that seems unlikely.

But even more important than the additional cost, said Teng, was the fact that supporting LTE now would force Apple to boost the size and heft of the iPhone, moves that would be completely counter to its past practice of delivering as small and as thin a smartphone as possible.

The extra components for LTE would include not just the baseband processor, but also the supporting chipsets, such as those that regulate power. Teng's point was that Apple would find it impossible to pack the additional chips on the iPhone's current circuit board, requiring it to increase the physical footprint of the phone, as well as its weight.

HTC's Thunderbolt, for example, tips the scales at 6.23 oz., or 30% more than the iPhone 4's 4.8 oz., and is taller, wider and thicker than the iPhone 4.

While the iPhone 4 is just 0.37-in. thick, the Thunderbolt is, at 0.56-in., 51% thicker. In fact, the Thunderbolt is 22% thicker than Apple's first-generation iPhone from 2007.

Although Apple would be able to use a Thunderbolt-esque approach to building an LTE iPhone this year -- bundling a Qualcomm LTE chipset with separate chipsets to handle the two prominent 3G standards for an all-in-one smartphone -- comments by Apple executives led iSuppli to bet otherwise.

"The first generation of LTE chipsets force a lot of design compromises with the handset, and some of those, we are just not willing to make," Tim Cook, Apple's chief operating officer, said during an earnings call with analysts last April.