*Update: According to The Verge, HTC has confirmed that the One S being sold in the Asia-Pacific region as well as some European markets is equipped with Qualcomm Snapdragon S3 dual-core processor. A press release sent out earlier by HTC Singapore also states the device running on a Qualcomm Snapdragon 1.7GHz dual-core processor.
When the HTC One S was first unveiled at Mobile World Congress 2012, the device was announced as running on the latest Qualcomm Snapdragon S4 dual-core 1.5GHz processor. However, the unit launched in Taiwan comes with an older Qualcomm Snapdragon S3 dual-core 1.7GHz processor.
According to ePrice, HTC issued a statement that the One S sold in Taiwan will deliver the performance and user experience. Besides the change in processor, it seems that everything else remains the same - Android 4.0 with HTC Sense 4, a 4.3-inch Super AMOLED display, 1GB RAM and an 8-megapixel camera.
HTC - "As with many high-demand HTC devices, we always work with our supply chain partners to source models which will allow us to meet customer demand as quickly as possible. In cases where more than one part is used, we ensure the same high bar of quality in the part to provide an equal user experience."
One possible reason for the change in processor could be due to the Snapdragon S4 processor shortages that Qualcomm is currently facing due to overwhelming demand. In case you are wondering why the Snapdragon S4 processor is found in the recently launched HTC One XL and not the upcoming HTC One S, the reason is simple.
The S4 chipset is the industry's first fully integrated LTE world mode/multi-mode modem which supports all of the world's leading 2G, 3G and 4G LTE standards. As the LTE variant of the One X, it only makes sense that the One XL will get higher priority than the One S. Nevertheless, consumers in other countries such as the U.S and U.K are still getting the One S with the S4 chipset.
When we visited HTC Southeast Asia website, the One S is stated as running on a 1.5GHz dual-core processor. However, specifications are subject to change without prior notice. We've reached out to HTC Singapore on this matter and will update this section with more information when it's made available to us.