WiFi

Improvements to WiFi come every generation partly just due to better combo chips coming from Broadcom's aggressive roadmap in that space, and we wouldn't be surprised to see further generational improvement here. If you read our reviews, this will sound like a broken record, but the inclusion of 5 GHz WiFi support in smartphones is something that is starting to become relatively mainstream at the high end, and we wouldn't be shocked to see the iPhone follow suit.

The location of that antenna moved from the external metal band on the GSM iPhone 4 to an internal printed one with the CDMA iPhone 4 so that the top band could be repurposed for cellular receive diversity, something the 4S inherited. I would strongly expect that to continue with the next device given the aforementioned MIMO requirements for LTE. Multi spatial stream support for WiFi is still basically out of the question, improvements in this space are again possible 5 GHz support with 40 MHz channels, which we've seen from BCM4334 in other shipping devices already.

Apple iPhone - WiFi Trends
  Release Year WiFi + BT Support WiFi Silicon
iPhone 2007 802.11 b/g, BT 2.0+EDR Marvell W8686, CSR BlueCore
iPhone 3G 2008 802.11 b/g, BT 2.0+EDR Marvell W8686, CSR BlueCore
iPhone 3GS 2009 802.11 b/g, BT 2.1+EDR Broadcom BCM4325
iPhone 4 2010 802.11 b/g/n (2.4GHz), BT 2.1+EDR Broadcom BCM4329
iPhone 4S 2011 802.11 b/g/n (2.4GHz), BT 4.0+EDR Broadcom BCM4330
iPhone Next 2012 ? Broadcom BCM4334?

 

Battery

Battery life on a device is obviously a function of the inherent efficiency of its components, but also is a function of overall battery capacity. Increasing the size of that tank obviously gets you immediate gains in overall lifetime, at the expense of increasing the mass or volume of the device. The iPhone has been no stranger to increases in battery life, and in fact the iPhone 4 realized a considerable jump in overall battery size thanks to the side by side PCB / battery split that has now dominated smartphone design. Since then we haven't seen as much of an increase in capacity, and meanwhile some Android phones are shipping batteries as large as nearly 8 Whr (2100 MaH, 3.8V in SGS3).


Higher capacity iPhone Battery (courtesy: 9to5Mac)

Recent leaks out of China have, howver, indicated that the next iPhone will likely move to a higher voltage chemistry, up from 3.7 V nominal to 3.8 V nominal. This follows the move that Motorola made over a year ago to the 3.8 V nominal chemistry where I saw it the first time. Since then Motorola has shipped almost all its phones with 3.8 V batteries, followed by Nokia and Samsung. Thus it seems highly likely that Apple will also move to this chemistry given maturity and the tangible benefits it provides to battery lifetime.

Apple iPhone - Battery Trends
  Release Year Battery
iPhone 2007 1400 mAh, 3.7V (5.18 Wh)
iPhone 3G 2008 1150 mAh, 3.7V (4.25 Wh)
iPhone 3GS 2009 1219 mAh, 3.7V (4.51 Wh)
iPhone 4 2010 1420 mAh, 3.7V (5.25 Wh)
iPhone 4S 2011 1430 mAh, 3.7V (5.29 Wh)
iPhone Next 2012 1440 mAh, 3.8V (5.47 Wh)

 

Conclusions

Based on everything we've seen, and the analysis on the previous pages, it seems likely that the next iPhone will feature a dual-core Cortex A9 SoC built on Samsung's 32nm LP (HK+MG) process, with a PowerVR SGX 543MP2 driving a larger 4-inch display. Battery capacity will see a slight bump, but battery life itself should be measurably better compared to the iPhone 4S thanks to a move to 28/32nm silicon for the baseband and apps processor. LTE and TD-SCDMA support will likely be driven by a Qualcomm MDM9x15. Evolutionary improvements in the WiFi stack are a reasonable expectation, however NFC support isn't. There are still questions about final details (e.g. camera sensors) but a lot of what Apple has been doing with the iPhone closely follows an aggressive 2-year design and silicon cadence. It's the relentless competition and hyper Moore's Law curve in the smartphone space that drive Apple's development cycle here. I don't expect much change here for the next couple of years at least.

Despite the annual release schedule and a 2-year cadence for most silicon elements, Apple also appears to remain relatively conservative in how it adopts new technologies. Process nodes, new chip architectures, and new wireless standards are all evaluated with a fairly conservative eye. Apple's iPhone business is a well oiled machine at this point, any unnecessary risks are consistently avoided.

NFC, Unlikely
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  • solipsism - Monday, August 27, 2012 - link

    "Thus it seems highly likely that Apple will also move to this chemistry given maturity and the tangible benefits it provides to battery lifetime."

    What do you mean by maturity and tangible benefits? Why couldn't any of these vendors used 3.8V before?
    Reply
  • mfenn - Monday, August 27, 2012 - link

    You don't just call up the battery fairy and ask her to set your battery to a certain voltage. Instead, a battery's terminal voltage is largely determined by the different compounds that you use as the anode and cathode, hence chemistry. Reply
  • aguilpa1 - Tuesday, August 28, 2012 - link

    Well I called up the battery fair..., she put me on hold. Reply
  • ImSpartacus - Wednesday, September 05, 2012 - link

    Is the Battery Fairy a meme yet?

    http://www.anandtech.com/show/6230/the-anandtech-p...
    Reply
  • Brian Klug - Monday, August 27, 2012 - link

    Well Motorola used the 3.8 V nominal chemistry for over a year successfully. I guess what I mean is that for Apple to ship that (and now we see Samsung doing the same with SGS3, Nokia with PureView 808, etc) the cell chemistry and manufacturing needs to be mature enough that they're guaranteed volume sufficient for it to not be the limiting component in the supply chain.

    -Brian
    Reply
  • Penti - Wednesday, August 29, 2012 - link

    If the Koreans and Japanese can build the cells then the Taiwanese firms / suppliers building Apples batteries can also utilize 3.8 V chemistry obviously. Hardly a technology that Apple would push much but it seems the 3.8V nominal tech is mature. As you say. Tooling and process would appear to work out if it's already out in tens of millions of devices. Really depends on requirements from Apple, it's not like they have set their mind on a particular cell supplier or battery assembly company. If they can source it successfully from the battery suppliers I doubt they care much about the details further back the supply chain so long that they or those companies can keep up and deliver. It's technology only a few companies in the world have mastered, we in the west can at best hope to assemble the components here pretty much.

    Samsung SDI Cells according to the shots here, I would think they have that technology and manufacturing process well developed. Normally Dynapack and Simplo who assembles the batteries for them. We'll have to wait and see, at least they are hardly expected to move to high-capacity batteries. Don't know if BYD, LG Chem, Panasonic, Sony and the rest etc is ready to ship this chemistry though. Samsung SDI and LG Chem should have most of the market and have moved quite far along there. Using the best Samsung cells when it becomes a commodity makes sense I guess.
    Reply
  • Azethoth - Tuesday, August 28, 2012 - link

    You really do want to not blaze new trails with the battery since a wrong move can leave you with an incendiary product which is not that good for sales. Maturity means its been proven out on other devices that are not in your pants all day long. Reply
  • Jingato - Tuesday, August 28, 2012 - link

    And people say Apple is Innovative. Reply
  • Nfarce - Tuesday, August 28, 2012 - link

    Well they are certainly innovative at destroying competition. Reply
  • swb311 - Tuesday, August 28, 2012 - link

    Destroying THE competition? Reply

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