No, T-Mobile does not sell the Samsung Galaxy S5 Active. You could technically buy one from AT&T and unlock it and use it on T-Mobile but it won't support all the frequency bands of the T-Mobile network. There was a rumor back in May that T-Mobile would get their own Galaxy S5 Active model at the end of July, model SM-G870T (the AT&T model is SM-G870A). Here's a link to the rumor.
http://androidcommunity.com/samsung-galaxy-s5-active-availability-leaks-out-20140529/
Yes. They have the Samsung Galaxy S4 Active.
None of the Samsung devices released since the Samsung Galaxy S5 are waterproof. Although, the Samsung Galaxy Active line are water resistant.
You get a pair of earphones when you purchase your Samsung Galaxy Ace 3.
I got mine at Walmart for $28, but at the Tmobile store its $100. You can also get it at Costco for $80.
No you have to purchase it
Most customers choose the Samsung Galaxy Note 2 over the Samsung Galaxy Mega, but depending on your specific needs and wants depends on which phone to purchase.
You can purchase Samsung Galaxy Blaze's on Amazon or Ebay. To learn more about them you can read customer reviews, product descriptions, or even search for articles about them.
Yes, Amazon.co.uk does sell the Samsung Galaxy S4. They have a wide variety of Samsung Galaxy S4 models and accessories available for purchase directly through their website.
The Samsung Galaxy S5 is water resistant (IP67 rated). The Samsung Galaxy S5 Active is both IP67 rated and MID-STD-810G rated.
I think you choose Samsung mobile phones instead of T-Mobile since they are cheap and with android built-in. And mostly people are having best feedback about Samsung phones.
The Samsung Galaxy S4 is not waterproof. The Samsung Galaxy S4 Active however is water-resistant, meaning it can withstand water (and dust), but can only stay submerged for 30 minutes for one meter or shallower.
There are many Samsung phones available. These include the Galaxy S4 Zoom, Galaxy Ace 3, I9190 Galaxy S4 Mini, I9295 Galaxy S4 Active, Galaxy Tab 3 10.1 and many more.