The first few days of the sales for Samsung Galaxy S5 have out-sold, not only other phones, but of the Samsung Galaxy S4's entire history!

That's according to GSM Arena, who are reporting that on the first day of launch, the much-anticipated Galaxy S5 -- the newest flagship in the Samsung Group -- has beat the sales of its predecessor, overall, by 30 percent. That 30 percent, mind you, is the total sales over the entire lifetime of the S4 phone. In some European markets, the sales of the S5 are at more than double that of the sales of the S4.

These are some pretty impressive numbers, considering the phone has only been on the market since Friday. That means, over the course of three days, the phone has outsold another phone that's been on the market for nearly 2 years.

Meanwhile, according to The Consumerist, various wireless service providers, including AT&T, Verizon, and Sprint, are coming under fire from fans of the phone because they have disabled the "Download Booster" feature that pairs WiFi and LTE services for faster download times and speeds.

T-Mobile, however, has confirmed to the outlet that the Download Booster feature will be made available on their phones.

There's no official word from two of the wireless service providers as to why they won't offer the Download Booster feature, but some rumors are suggesting that this is only the case "for now"; once the S5 finds a comfortable market after the launch (which, again, has only been for 2 days), the Download Booster will be made available. Could it also be made available for a fee?

A spokesperson for AT&T told the outlet, "We are evaluating Samsung's download booster feature. We thoroughly test new software, features and functionality to ensure that it meets our standards for a quality user experience." Sprint & Verizon had no comment.