The Net10 site has a form where you can "check availability". Depending on what zip code you enter you will either see "This phone is available soon in your area." or "This phone is not available in your area."
The phone uses the AT&T network, but for some reason NET10 is saying it's not available in many AT&T markets including San Francisco, New York City and Los Angeles. Hopefully this glitch will be fixed by the time the phone is available. If not, you can always enter an AT&T only zip code like 65046 or 76825 to order the phone. Just be sure to change back to your zip code on the shipping address page.
The Galaxy S II is a high end phone and it commands at high end price of $399.99. Although high, the price is not unreasonable. Amazon currently charges $449.99 for the Galaxy S II and that's for an international version without a US warranty.
The only comparable GSM Android phone that's less expensive than Net10's Galaxy S II is the Samsung made Galaxy Nexus, which you can buy directly from Google for $349.99 plus $10.50 shipping. Here's a table comparing the two.
|Net10 Samsung Galaxy S II||Galaxy Nexus by Samsung|
|Price||$399.99 free shipping||349.99 + $15 SIM + $10.50 shipping = $375.49|
|Operating System||Android 2.3||Android 4.1|
|Screen||4.3" 480 x 800 px Super AMOLED||4.65 in 1280 × 720px AMOLED|
|CPU||1.2 GHz dual-core||1.2 GHz dual-core|
|RAM||1 GB||1 GB|
|Internal Storage||16 GB||16 GB|
|Camera||8 megapixel, 1080p 30 fps HD video recording, single LED flash,||5 megapixel EDoF with LED flash|
|Video Recording||1080p 30 fps HD||1080p 24 fps HD|
|Size||125.3 x 66.1 x 8.49 mm (4.93 x 2.6 x 0.334 in)||135.5 x 67.94 x 8.94 mm (5.33 x 2.675 x 0.352 in)|
|Battery Capacity||1650 mAh||1750 mAh|
|Radio Freqencies||2G: 850, 900, 1800, 1900 MHz |
3G:850, 900, 1,900, 2100 Mhz
|2G: 850, 900, 1800, 1900 MHz |
3G:850, 900, 1700, 1900, 2100 Mhz
|Max HSPA+ Speed||21 Mbit/s||21 Mbit/s|
After paying shipping and buying a NET10 BYOD SIM, the Galaxy Nexus costs a mere $24.50 less than the S II.
But the Nexus has a bigger, higher resolution screen and the latest version of Android. Because it's a Google Nexus phone, it should get the all latest Android updates for at least the next twelve months. Plus it's unlocked for use with any SIM almost anywhere in the world and supports both T-Mobile and AT&T's 3G frequencies.
On the other hand the Galaxy S II has a better camera, not only on paper but the camera gets much better reviews. The S II is a little thiner and lighter and comes pre-configured to have data working "out of the box" on Net10. (The Nexus needs to have a few settings entered to get data and picture messaging working.) However the SII is running a version of Android two generations behind the latest and will likely never get an official update. There are 3rd party Android 4.1 ROMs available to bring it up to date if you are into rooting and ROMing.
If it was my money I'd take the Nexus over the S II, but if good camera is more important than having the latest version of Android you might be happier with the Galaxy S II.