Gaining over 9 million preorders worldwide, Samsung Galaxy S3 has turned out to be the most popular Android smartphone manufactured so far. AT&T, Sprint and T-Mobile were expected to release the smartphone on June 21. Blame it on the limited shipment of Galaxy S3, but the smartphone will not be hitting every carrier and store as it was meant to be, on the scheduled date.

Sprint has commented that it is "little behind" to launch Galaxy S3 on time due to overwhelming demand and limited supply. T-Mobile is also facing similar conditions. Due to short supplies, T-Mobile will be releasing Galaxy S3 in selected markets only, while the smartphone will be available across the country on June 27. You can find the list of top 29 markets that will be getting Samsung Galaxy S3 on scheduled date here.

The latest addition to Galaxy S3's delays is AT&T. The carrier hasn't yet announced an official release date. Earlier, the customers who had preordered the smartphone from AT&T received confirmation that Galaxy S3 will arrive on or before June 21. However, the latest reports hitting blogosphere indicate that AT&T will debut Galaxy S3 on June 28.

Verizon Wireless has also pushed back the release date, but by one day only, from July 9 to July 10. Meanwhile, the launch of Samsung Galaxy S3 has also been delayed in Canada by a week across all the carriers.

The Canadian carriers say that the delays are due to overwhelming demand of Galaxy S3 in global market. However, the reason seems to be something else as the U.S. version of Galaxy S3 is little different from the global version. The international version of Samsung Galaxy S3 runs on quad-core Exynos processor. But, the U.S version of Galaxy S3 packs Snapdragon S4 chipset as quad-core chips are not compatible with 4G LTE networks.

The main cause behind the limited supply of 4G LTE variant of Galaxy S3 is shortage of Qualcomm's Snapdragon S4 chipset. The new chipset is based on Coretex-A15 architecture. The foremost rival to Galaxy S3 - HTC One X - also packs the highlighted silicon. The shortage has also affected other smartphone manufactures too. As a replacement, HTC is shipping One S with older Snapdragon S3 processor chips in India.