The "All New HTC One" will debut on March 25, but a new leak now claims to offer the detailed specifications ahead of the big unveiling.

HTC may have tried to keep its upcoming 2014 flagship smartphone under wraps except for a few teaser videos it posted, but the smartphone has leaked extensively so far. In fact, the HTC One successor dubbed the HTC M8 or the All New HTC One could be among the worst-kept secrets ever, judging by the amount of leaks that made their way online.

After seeing some press shots, a hands-on video, and lots of rumors and speculation, we now have the alleged detailed specifications of the All New HTC One, courtesy of the folks over at GSMArena.

"We've got our hands on the complete and detailed specs of the smartphone," GSMArena claims in an exclusive report. "We also acquired what appears to be a sales guide depicting the key features of the HTC One (2014) and how the company's representative plan on marketing them."

According to the report, the HTC One successor will sport a 5-inch display, as previously rumored. Under the hood, the handset will reportedly boast a quad-core Qualcomm Snapdragon 801 processor clocked at 2.3GHz, and pack a 2,600 mAh battery. Other features include a nano-SIM, like the one found on the iPhone 5, iPhone 5C, iPhone 5S, Moto X, and others, and the smartphone will also reportedly come with 16GB of internal storage capacity (10GB of which will actually be available to the user) and a microSD card slot for additional memory.

GSMArena has no information on the camera resolution, but notes that the rest of the camera specs seem to be the same as last year's HTC One, meaning that it could be a 4-megapixel UltraPixel camera with 1/3.0" size, f/2.0 aperture and so on. In its most recent teaser video, HTC taunted the upcoming flagship's UltraPixel awesomeness, but gave no specific details.

The guide obtained by the publication indicates that the video capture capabilities will remain at 1080p and not 4K, while the phone's front-facing shooter will now reportedly boast a 5-megapixel sensor. The HTC One successor is further expected to come with a Barometer, but no FM Radio.

Keep in mind, however, that all of these specs are based on leaks and speculation at this point. As previously mentioned, the HTC One successor will make its official debut in a little less than two weeks, on March 25, so we'll soon know all there is to know about it. We'll keep you in the loop as soon as we learn more, so stay tuned.