The Apple iPad Review (2012)
by Vivek Gowri & Anand Lal Shimpi on March 28, 2012 3:14 PM ESTThe iPad as a Personal Hotspot: Over 25 Hours of Continuous Use
Verizon makes the decision of which iPad to buy even more difficult by being the only of the two US carriers to enable the personal hotspot option on the new iPad. For no additional monthly fee on top of your data plan your Verizon LTE iPad can act as a wireless hotspot, allowing up to five other devices to use its cellular connection over WiFi (2.4GHz only, unfortunately) or Bluetooth. One device can use the hotspot via the iPad's USB dock cable.
If you don't already have the personal hotspot option in the initial settings page, you'll need to go to general settings, then network, and activate personal hotspot there. Once you've done so you'll see a new item for personal hotspot in the default settings page.
You must remain on the personal hotspot settings page for the iPad's SSID to be visible to nearby devices. Once you leave the settings page, the iPad stops broadcasting its personal hotspot SSID.
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In general the iPad's personal hotspot seems to be better behaved than similar options under Android. I've noticed all too often that Android hotspots will either stop routing traffic after an extended period of use, requiring either cycling the radio states on the hotspot device itself or in some cases a full reset of the hardware. The iPad wasn't immune to this sort of behavior, it just seemed to happen less than on the Android tablets and smartphones that I've tested. In one test it took only a few hours before I had to reset the iPad to make its hotspot work properly again, while in another case it was only after 24 hours of continuous use that the feature began misbehaving. Overall I am very pleased with the Verizon iPad as a personal hotspot, the bigger issue is the cost of the data that you're sharing with all of those devices.
As I mentioned in our Galaxy Tab 10.1 LTE review, these LTE tablets make great hotspots simply because you are pairing smartphone modems with gigantic (for a smartphone) batteries. The end result is if you have to treat your LTE tablet as a true hotspot (screen off and all), you get great battery life. The new iPad takes this idea to a completely new level since its battery is now squarely in the laptop-sized category, but its LTE modem is still designed to run on a < 6Wh smartphone battery.
Our standard hotspot battery life test involves running four copies of our web browsing battery life test and playing a 128Kbps internet radio stream on a laptop tethered via WiFi to the hotspot being tested. While peak download speeds during this test can reach as high as 1MB/s, remember that these web browsing battery life scripts include significant idle time to simulate reading a web page. The average data transferred over the duration of the test amounts to around 25KB/s if you take into account idle periods.
With the Galaxy Tab 10.1 LTE I tried something different—letting the tethered notebook download at full speed using the Tab's LTE connection. On the new iPad, after nearly an hour of downloads at well over 1MB/s I saw no drop in the battery percentage indicator—it was stuck at 100%. Not wanting to upset Verizon too much, I needed to find a good balance between a realistic workload and something that wasn't going to make me rack up over a hundred GB in overages.
If our standard hotspot test averages around 25KB/s of transfers, I figured doubling it couldn't hurt. I downloaded a sufficiently large file at a constant 50KB/s on a laptop tethered over WiFi to the new iPad to see how long it would last. The result was astounding: 25.3 hours on a single charge
I used up over 4.5GB during this period—almost the entire amount that my $50/month plan gave me, all without having to plug the iPad in to recharge it. That's the beauty of using a 42.5Wh battery to drive a cellular modem that can last a couple of hours on a tenth of that capacity. If you want to use the new iPad as a personal hotspot, you'll likely run out of data before you run out of battery life.
It's a real shame that AT&T decided against enabling personal hotspot on its version of the LTE iPad. It's for this reason alone that I'd recommend the Verizon version, assuming that you're planning on using your iPad in an area where Verizon has LTE coverage of course.
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jjj - Wednesday, March 28, 2012 - link
Testing battery life only in web browsing ? Maybve that would be ok for a 100$ device.As it is the battery tests are prety poor,you do video playback when every SoC out there has a dedicated decode unit and that test is only representative for vid playback.Here the most important test should have been battery life when both GPU and CPU are loaded and not including that seems like an intentional omission to avoid makiing the device look bad.There are a lot of other things to say about the review,too many but one thing has to be said.
This is a plan B or plan C device.The screen is the selling point,is what had to go in,they didn't had 28/32nm in time and had to go for a heavier,thicker,hotter device with a huge chip (CPU speed is limited most likely by heat not so much power consumption,ofc both are directly related).Apple had to make way too many compromises to fit in the screen,no way this was plan A.
tipoo - Thursday, March 29, 2012 - link
I would have liked a gaming battery life test as well.PeteH - Thursday, March 29, 2012 - link
Beyond even that, I'd like to see a worst-case battery life (i.e. gaming, max brightness, LTE up, etc).Also, it'd be really interesting to see how brightness impacts battery life. Maybe the web browsing test at 20%, 40%, 60%, 80%, and 100% brightness. Of course that would probably delay the review by several days, so it might not be worth it.
Anand Lal Shimpi - Thursday, March 29, 2012 - link
We did a max brightness test, however a gaming test would be appropriate as well. I will see if I can't run some of that in the background while I work on things for next week :)Take care,
Anand
SimpleLance - Wednesday, March 28, 2012 - link
The biggest drain for the battery comes from the display. So, if the iPad will be used for hotspot only (with display turned off), you will get a lot of hours from it because it has such a huge battery.But then, using the the iPad just for a hotspot would be a waste of that gorgeous display.
Very nice review of a very nice product.
thrawn3 - Wednesday, March 28, 2012 - link
Am I the only one that feels the max brightness is more important in day to day use of a highly portable device than DPI and color accuracy?I absolutely would love to have all of these three be excellent but I think for a tablet or small laptop Max Brightness and DPI are higher priority than color accuracy. This is exactly what the ASUS Transformer Infinity is supposed to be but I would prefer it on a real laptop.
I care about color accuracy too but I am perfectly fine with needing a desktop monitor and trading brightness there since it is in a stable environment until we hit the technological level that will allow all these elements to be combined. Maybe quantum dot display technology in the future?
One thing I have to give all these new displays is that they FINALLY have gotten the wide viewing angles thing right and I will be so happy to get this into the rest of the market.
seapeople - Tuesday, April 3, 2012 - link
Would you really prefer a bright 1366x768 TN panel with 200 contrast ratio on a 15" laptop over a less bright IPS Ipad screen with much better resolution, DPI, color accuracy, and viewing angle?vision33r - Wednesday, March 28, 2012 - link
The screen is really gorgeous when you shoot raw with any DSLR and view it in iPhoto.ol1bit - Wednesday, March 28, 2012 - link
I just bought a Asus Transformer Prime, and your review was spot on with what I decided. I can not live with IOS and using Android for 3 years.Just the simple stuff was my decision:
1. Freedom of Android, file transfers, etc. No Itunes requirement.
2. MicroSD
3. Kewl keyboard
4. Live Wallpaper.
5. A real desktop, separate from my applications.
6. 32GB versus 16GB
7. Gorilla Glass (yes, true. My original droid lived in my pocket 2 years no scratches, my HTC Rezound scratches the first 2 weeks).
8. Asus (love their MBs)
9. Nivida (love their GPUs)
What I will miss:
1. Ipad 3 Display.
darkcrayon - Thursday, March 29, 2012 - link
1. iTunes is no longer ever needed for an iOS device. I consider the option of a first party desktop sync solution to be an advantage now that it's not a requirement.7. It seems likely the new iPad uses Gorilla Glass or Gorilla Glass 2...
9. Odd that you'd love nVidia's GPUs when they've been pretty much the bottom of the performance barrel for ARM device graphics, even excluding Apple's SoCs (which have lately been using the fastest GPUs in the industry by far).