We compare the specs, prices, screens and the rest of two of the most important Android phones of the year. Don't fancy a read? Watch the video comparison of the Samsung Galaxy S3 and HTC One X.
Finally, the most anticipated Android phone of the year is here - the Samsung Galaxy S3 has arrived. But how does it compare to the current king of Android, the HTC One X? Both have quad-core processors, high-end 4-plus inch 720p screens and slim bodies. But which will we remember as the most important Android phone of 2012? We look into the specs to find out which is destined to be king.
And our full HTC One X review
Samsung Galaxy S3 - £499 SIM-free
HTC One X - £449 SIM-free
The world of contract deals is diverse and - quite often - a little confusing. However, the SIM-free price is much simpler. The HTC One X costs a good £50 less than the Samsung Galaxy S3 at present, suggesting HTC is keen to compete with Samsung's Android crown.
To get either phone on a contract, you'll have to pay at least £35 a month if you want to get the phone for free direct from one of the main phone networks. Thanks to the huge demands for the Samsung Galaxy S3, that figure is likely to be much closer to £40-45. However, phone deals change all the time so keep your eyes peeled over the coming months.
Body and dimensions
Samsung Galaxy S3 - 136.6 x 70.6 x 8.6mm, 133g, plastic
HTC One X - 134 x 70 x 8.9 mm, 130g, plastic
Rules are forming around the making of ultra-large screen mobiles. They tend to be 8-9mm thick, weigh between 125g and 140g and are made of plastic rather than metal, in order to keep the weight down. The Samsung Galaxy S3 has - perhaps disappointingly - subscribed to this formula. It comes in glossy white and faux brushed metal, although the surface is one hundred per cent plastic. Like the Samsung Galaxy S2, its battery cover is a very thin sheet of plastic. It's hard-wearing enough if you treat it fairly well, but doesn't really have that high-end, ultra-premium feel.
The HTC One X uses a plastic body too, but gets a slightly more impressive sense of solidity. This is because it doesn't give you access to the battery. It's all sealed up. Practicality-wise, it's not so great, but form-wise its a definite plus. For those long-haul trips, though, the Samsung Galaxy S3 lets you take a few spare batteries with you.
Samsung Galaxy S3 - 4.7in Super AMOLED, 720p resolution
HTC One X - 4.7in Super IPS, 720p resolution
Just as we found in our comparison of the HTC One X and Samsung Galaxy Nexus, comparing these screens comes down to a question of display type rather than tech specs. Both screens are 4.7in across, and both use a 720p display.
The big difference is that while the HTC One X uses and Super IPS display, the Samsung Galaxy S3 uses a Super AMOLED panel. IPS screens use backlights, where the AMOLED type has light-emitting pixels.
AMOLED looks better in dark conditions, where a traditional backlight becomes visible in areas of black, but we found that the HTC One X offers more accurate colour reproduction and whiter whites than the Super AMOLEDs we've seen. The HTC One X screen is also perilously close to the surface, making its image all the more vital-looking. They're close rivals, but we'd pick the One X at a pinch.
Samsung Galaxy S3 - Quad-core 1.5GHz, Exynos chip
HTC One X - Quad-core Tegra 3
Both the Samsung Galaxy S3 and the HTC One X have quad-core processors - which are already becoming the norm for top-end phones. The HTC One X uses the follow-up to the Tegra 2, which was used by many Android devices in 2011.
It's powerful, sure, but not quite as powerful as you might expect. The dual-core TI OMAP Samsung Galaxy Nexus processor beats it in some benchmarks, for example. The Samsung Galaxy S3 uses an Exynos 4412 quad-core 1.5GHz processor, which soundly beats the Tegra 3 across the board, just as the Samsung Galaxy S2 wiped out most of its processor competitors last year.
However, exactly what this power will mean in real terms is yet to be seen. Benchmarks are fine, but staring at charts and graphs sure gets dull pretty quick. The good news in practical terms is that quad-core processor like this let the phones handle high bit-rate 1080p video - and the Samsung is the clear winner here, with more advanced video codec support.
Samsung Galaxy S3 - 16/32/64GBGB, 1GB, microSD slot
HTC One X - 16/32GB, 1GB RAM
Huzzah - our fears have not been realised. The Samsung Galaxy S3 is staying in bed with the Android geek brigade and has packed in a microSD slot, making it super-simple and super-cheap to boost the internal memory. HTC left out this feature in the HTC One X.
The Samsung Galaxy S3 also offers a wide range of internal memory options - 16GB, 32GB 64GB. Of course, unless there's only a paltry price difference between them, you're much better off opting for the 16GB model and investing in a 32GB microSD card or two - one for music, one for movies perhaps.
This is a field in which the Samsung is the clear winner. There's a 64GB model, and with expandable storage, the 16/32GB HTC One X can't compete.