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iPad 3G Disassembly, 3G Video Streaming and GPS Improvements


The iPad 3G was delivered to customers on Friday, about a month after the launch of the Wi-Fi iPad. The main differences between the units are the inclusion of a 3G data module as well as GPS functionality in the newer model. iFixit has already performed a teardown of the new unit, though few surprises were found.

Some additional notes of interest:

- Gizmodo notes that Netflix works over 3G but with down sampled video. ABC's app, however, refuses to play over 3G and is Wi-Fi only.
- Dan Frommer suggests ABC's 3G limitation is due to content licensing issues rather than a technical limitation imposed by either Apple or AT&T. When questioned, AT&T deferred to Apple for specifics.
- Gizmodo also describes a comparison of GPS functionality between the iPad and the Phone 3GS. According to their tests, the iPhone 3GS locked onto the GPS signal faster, but the iPad was more accurate and consistent.
- A few MacRumors forum members noted similar improvements in GPS, finding the Navigon app to work much better on the iPad:

With the iPhone navigon would jump me around and tell me to get on the freeway when I was already on the freeway. With the iPad 3G ... It updated my position in real time while I was pulling out of my driveway ... 40 ft.

- iFixit's teardown shows the iPad uses a different GPS chip (Broadcom BCM4750UBG Single-Chip AGPS Solution) compared to the iPhone 3GS, explaining the improvement.
- TUAW notes that Skype over 3G connections failed (as expected. They report that 3rd party SIM cards worked properly in the iPad.

Top Rated Comments

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23 months ago
that was so fast

I don't like it when people purchase new stuff to disassemble
Rating: 0 Positives / 0 Negatives
23 months ago
Why is that iPhone so big?:rolleyes:
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23 months ago
I have had my iPad 3G for 5 hours..... and the GPS is fantastic!

Tried it while my sister was driving

and it moves

Apple gets an A+ with the GPS:D
Rating: 0 Positives / 0 Negatives
23 months ago
PLEASE PLEASE PLEASE bring this new GPS chip to the new iPhone being announced at WWDC!
Rating: 0 Positives / 0 Negatives
23 months ago

suggests ABC's 3G limitation is due to content licensing issues rather than a technical limitation imposed by either Apple or AT&T.


criminey, will we EVER get past all this nonsense licensing ********? wifi is ok, but 3G isn't?

one day, we'll look back on all this as a ridiculous fantasy-land of ignorance. i hope.
Rating: 0 Positives / 0 Negatives
23 months ago
GPS? I thought iPad only had "assisted GPS" ie: WiFi and Cell-tower triangulation?
Rating: 0 Positives / 0 Negatives
23 months ago

GPS? I thought iPad only had "assisted GPS" ie: WiFi and Cell-tower triangulation?


Assisted GPS doesn't mean what I think you think it means.
Rating: 0 Positives / 0 Negatives
23 months ago

GPS? I thought iPad only had "assisted GPS" ie: WiFi and Cell-tower triangulation?


The 3G version has real GPS. Also, assisted GPS does not mean triangulation only, it means that on GPS startup triangulation data from wifi and cell towers is used to bootstrap the GPS receiver with an estimated position. The GPS then takes over without the potentially long startup times that non-assisted GPS has.
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23 months ago
I want one so badly but right now I'm pawning off a bunch of stuff just to get one soon! :):rolleyes:
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23 months ago

I have had my iPad 3G for 5 hours..... and the GPS is fantastic!

Tried it while my sister was driving

and it moves

Apple gets an A+ with the GPS:D


Cool! Makes me look forward to the “iPhone (Glass Backplate)” or whatever catchy name the 4th-gen will have :)

GPS? I thought iPad only had "assisted GPS" ie: WiFi and Cell-tower triangulation?


That’s not assisted GPS. You’re talking about what the original iPhone had. Assisted GPS means you DO have a real connection to GPS satellites, but you’re ALSO getting assistance from cell towers. (Not just triangulation: actual signal-processing assistance from computers connected to the towers.) That means A-GPS can be faster and more accurate than an unassisted GPS unit.

Also, I notice that my iPhone 3G does keep tracking even when I drive out of cell coverage. The blue dot moves off the already-loaded image and across the gray grid of the Maps app (no visual data can arrive). But it does move. (However, if I START the Maps app with no coverage, IIRC, I get an error and it won’t even try to proceed. I could be mistaken. I’ve been wondering how 3rd-party GPS apps perform when out of cell range—the apps that have their map data built in. But I haven’t tried any yet.)
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