The 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.

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

WiFi Hotspot Battery Life Time

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.

The Most Tangible Feature: LTE Support The Camera, It's Much Improved
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  • vol7ron - Thursday, March 29, 2012 - link

    Think you meant "except" :)
  • adityarjun - Friday, March 30, 2012 - link

    No, you aren't
  • siddharth7 - Friday, March 30, 2012 - link

    Yeah! Kind of a typo :). Also forgot the question mark. :-)
    Wanted to edit it, but was not able to after posting. :)
  • Xyraxx - Thursday, March 29, 2012 - link

    Ok, gaming clearly the TF came out ahead. Why the backhanded commentary in that section? I don't see that for the sections that the iPad clearly won. TF takes the overall top spot for its gaming performance. But instead of commentary on that, we get aggressive talk about how they should be pushing even further ahead, and how they are failing at it.

    The controller compatibility is an absolute win for the Android side, but instead of talk about that, we get this "Yeah, but who says controllers will win over touch". Its like every advantage the iPad doesn't win over, gets trotted out and downplayed as if to say it doesn't mean anything, or somehow doesn't matter.
  • darkcrayon - Thursday, March 29, 2012 - link

    Interesting. I got a different impression entirely. It seems like games specifically optimized for the Tegra 3 by nVidia were somewhat better visuallyr, but the iPad has a more extensive game library and considering the GPU is far more powerful than the Tegra 3's, it's only a matter of time before there are far better graphics to be had on iPad games.

    Though there is no OS level controller support in iOS, both Bluetooth and dock connector controllers are possible (hence the iControlpad iCade, and a few others). It may be that more games support them now on Android, but nothing is stopping developers from supporting them on iOS at this point.

    Finally, it's pretty important that ~100% of the iPad games in the App Store will run on the new iPad, which can't be said for the TF as shown in the review, or probably for any other individual Android tablet.
  • mr_ripley - Thursday, March 29, 2012 - link

    It seems to me that the iPad does charge when I plug it into the USB port on my Macbook Pro. In fact I was surprised to see that not only did it not say "not charging" and show the "plugged-in" icon, it also seemed pretty fast (I will have to try it again to see if it was as fast as the power charger).

    However, when I tried to this morning to plug it into my Lenovo laptop it showed "not charging". Does this only work when plugged into Apple products?
  • vol7ron - Thursday, March 29, 2012 - link

    This question seems better suited for the Apple support forums.
  • doobydoo - Sunday, April 1, 2012 - link

    This reply seems better suited to the kids-r-us forum.
  • Aenean144 - Thursday, March 29, 2012 - link

    Modern Macs have special USB hubs that output 7 to 8 Watts of power (~5V at ~1.6A). Most Windows machines or non-Macs and older Macs output about 4.5 Watts max. There's a USB battery charging specification, but I'm not aware of any computers that have this implemented.

    So, most Mac should be able to charge an iPod, iPad, iPhone relatively quickly. A PC with the normal USB specs will typically do it a little bit slower. 40 to 50%. 4.5 Watts is basically the bare minimum. Doable on an iPad 2 with the screen off, but the 2012 iPad will be tough. If you have the screen off, turn off WiFi and Bluetooth, it'll charge ok if Apple lets it. The screen has to be off with 4 Watt power source.
  • mr_ripley - Thursday, March 29, 2012 - link

    Ah ha! Thanks for the clarification. When I saw that I was able to charge my new ipad while using it with my Macbook pro USB, I neglected to bring along my charger to work. Seems like that was unwise.

    But I still have around 50% power left so should be fine for today. And yes I do use it at work.

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