Ever worry that your iPad is bombarding you with radiation when connected to a 3G mobile data signal? We're used to hearing about SAR (Specific Absorption Rate) when it comes to mobile phones, however tablets are also regulated by FCC limits. Pong Research has experience developing smartphone cases that divert potentially harmful energy away from the user's body.

Now they have launched the Pong iPad and iPad 2 case, to provide the same antenna technology to tablet users. The Pong case diverts radiation away from the user, reducing the SAR by up to 82 percent of FCC limits. The case also provides enhanced 3G connection performance.

Unlike the original iPad, which was limited to AT&T Mobility only, the iPad 2 with 3G will also come in Verizon Wireless models. A variety of data plans are available as detailed below:

AT&T Mobility (GSM)

AT&T Mobility has announced a new option for iPad 3G data users, a postpaid cellular data plan for tablets. Currently all iPad data plans must be prepaid to start service by activating the subscription directly on the iPad.

Existing customers can now add the iPad data charges to their monthly wireless bill from AT&T and pay one bill at the end of each month. Those who don't yet have a postpaid account with AT&T can start one for the iPad, only a credit check is necessary and the plan can't be activated on the iPad itself.

Yes, if you are already signed up for an unlimited data plan AT&T will allow you to keep this plan with the iPad 2.

AT&T has confirmed those looking to upgrade their original AT&T iPad Wi-Fi + 3G will not have to switch to tiered data plans, as long as the unlimited data plan has been paid continuously month-to-month and is active when purchasing the iPad 2.

You can cancel the auto-renewal of your AT&T 3G iPad data plan at any time. Follow these instructions to cancel your service:

1. On the iPad navigate to Settings -> Cellular Data -> View Account
2. Log in to your AT&T Cellular Data Account with your email and password and touch Next.
3. Select Add or Change Data Plan -> Cancel Plan
4. If you want to reactivate your data plan within 60 days you can select Cancel Plan and Delete Account Later to avoid setting up the account from the beginning.

Great news is here for those interested in using an iPad on the Verizon network. Apple is producing iPads with components that will make it possible to use these devices directly on Verizon's cellular data network. In a clear sign that no exclusive iPad deal with AT&T exists, Verizon Communications CFO Francis Shammo told Bloomberg the Verizon iPad was coming soon.

No timeframe or pricing was given, however the iPhone 4 is scheduled to arrive on Verizon's network as early as February 3. Also unclear is whether or not the Verizon iPad will use the company's current CDMA network or launch with LTE capability.

Thanks to many iPad 3G service providers offering month-to-month plans for 3G cellular data connectivity on the iPad, many WiFi+3G iPad owners either don't use 3G connectivity at all times, or never use it. That, however, won't stop the iPad from incessantly asking if you'd like to sign up for a cellular data account every time you're out of range of WiFi. Hitting "Later" 1,000 times won't change the frequency either. It seems the iPad can't take a hint.

To stop your iPad from badgering you about signing up for a 3G data plan, simply go to

Settings -> Cellular Data

AT&T Wireless released two months worth of iPad 3G data, stating that 400-500 thousand units were activated with data plans on its network during the period. 75-80 percent of these users chose the top-tier monthly data plan over the smaller plan with a low bandwidth limit. Initially, AT&T offered iPad owners the choice of an unlimited data plan or 200 MB.

AT&T has since moved to a tiered data plan on the iPad and iPhone 4. Users can now choose between 2 GB per month or 250 MB. Apple sold over three million iPads in several countries since the April launch. AT&T has an exclusive US contract to provide data plans for the iPad 3G, and offers customers monthly data plans that can be cancelled at any time.

No, according to AT&T and Apple. In reality, you can swap your iPhone 4 micro-SIM card into the iPad 3G and use your existing iPhone data plan. Jailbreaking is not necessary, only a willingness to change APN settings and violate the terms of your user agreement.

Follow the steps below to use the iPhone 4 data plan on an iPad 3G at your own risk.

1. Turn off cellular data on the iPad by choosing Settings -> Cellular Data -> Cellular Data -> OFF.

Lawyers have lined up behind iPad owners who feel that Apple and AT&T Wireless unfairly baited them into purchasing an iPad 3G with the promise of unlimited data plans. Since the iPad was launched, AT&T has announced the switch: unlimited data plans were due to be removed as an option on June 7. A class-action lawsuit has been filed in United States District Court representing consumers from several states.

Many users are finding that the iPad 3G unlimited data plan is still available, and AT&T has stated that users keeping their unlimited data plan paid every month would be able to keep the plan. A change was also made to the lower-tier plan, with a 250 MB cap reduced to 200 MB for the same price of $15.