According to popular gadget teardown website – iFixit, “The recently released LG made Google Nexus 4 has a Qualcomm made 4G LTE modem chip inside.” Formally, the Nexus 4 phone supports HSPA+">HSPA+ only.
• Quad-core 1.5 GHz Qualcomm Snapdragon S4 APQ8064 Krait mobile processor
• Adreno 320 graphics chip
• 2 GB RAM
• 3D graphics
• Android 4.2 Jelly Bean update
• 8 megapixel camera
While unveiling it, both Google and LG have not announced the LTE chip. While explaining the absence of LTE in Nexus 4, senior vice president for mobile and digital content at Google, stated, "A lot of the networks that have deployed LTE haven't scaled completely yet. They're hybrid networks which mean the devices need both radios built into them. When we did the Galaxy Nexus with LTE we had to do just that, and it just wasn't a great user experience."
The iFixit Teardown of Nexus 4 disclosed Qualcomm WTR1605L Seven-Band 4G LTE Chip inside. This transformation has been surprising for many consumers as well as tech enthusiasts. At this time there is no way to use this 4G LTE modem and it would need more than a simple hack to enable using this chip.
As per Rubin, “Hybrid networks make use of both radios built on the motherboard to be used. For instance, if you have a 4G LTE Smartphone, the data connection will be active on 4G LTE while the voice calls would be active on 3G networks. That means the Smartphone would be actually using two different radio frequency bands for two specific purposes. Not to forget that it would consume more battery and also not offer decent real world experience”.
Till now Google has not disclosed any information on the presence of the radio or whether it will be made usable in the future.
Source : Themobileindian