Adding to the appeal of its new flagship Galaxy S3 smartphone, Samsung announced during the device's launch in London last month that it would come with 50GB of free cloud storage through Dropbox for two years. Though there was no mention of the promotion when the smartphone was announced across five carriers in the US earlier this week, customers just assumed that it was still part of the deal. But now it appears that users of two major US carriers won't be eligible for the free space promotion.

Select carriers have opted out of the promotion on phones otherwise eligible, reads a post on Dropbox's customer support page on the promotion. Unfortunately, AT&T and Verizon are among these carriers not currently participating.

As The Verge notes, the 50GB free cloud storage promotion, available internationally, adds 48GB more to Dropbox's regular 2GB free allowance and runs for the length of an average contract. It doubles the amount of free Dropbox storage offered by HTC's One series. In February, HTC announced its partnership with Dropbox to fully integrate its cloud storage into every HTC One phone, offering 25GB of free storage for two free years.

Though it's unclear as to why both Verizon and AT&T have opted out of the promotion with neither of them has commented on Dropbox's announcement, it's possible that one or both is planning its own cloud alternative, according to Slash Gear.

Unlike the US, the Samsung Galaxy S3 users in Europe are getting free Dropbox storage that can amount to as much as 66GB. After signing up to Dropbox via the app pre-loaded onto the Galaxy S3, users in Europe can get 48GB of extra space beyond the free space the cloud storage service typically offers.

Features of Samsung Galaxy S3

The Samsung Galaxy S3 sports a 4.8-inch HD Super AMOLED display, which is surrounded by an ultra-thin bezel to maximize the viewing area of the handset. It weighs 4.7 ounces (133.24 grams) and is 8.6 millimeters thin.

The device also features Android 4.0 Ice Cream Sandwich, 4G LTE connectivity, 2GB of RAM, a dual-core Snapdragon S4 processor clocked at 1.5GHz, an 8MP Rear-facing camera, a 1.9MP Front-facing camera and a 2100 mAh battery.

From the connectivity part, the smartphone comes with NFC, Bluetooth 4.0, DLNA, WiFi 802.11 a/b/g/n and MHL Video Out.

Galaxy S3's other features include AllShare Play, Group Cast and Share Shot functions allowing users to share photos with others. Another feature, S-Beam, allows easy transfer of large files from Galaxy S3 to another device by touching the backs of the two devices.

The much talked about feature of Galaxy S3 is S Voice, a language recognition technology allowing customers to control applications and services with words instead of touch. The handset also includes camera features like Best Shot to choose the best image from a series when taking a photo.

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