I just want to say forget what you hear. No matter what phone comes out you will hear poor battery and signal issues. Try it yourself because every physical phone is different. I have a Gnex on Verizon and I have none of these issues. Battery was decent and got me through an entire day on moderate use. Now I get through almost 2 days with moderate use being it's rooted.
Some say they never had a Sammy phone but then go on to say I passed because it had this and that. Well, you just said you didn't have a Sammy phone, so how can you speak on something you never experienced for yourself? Not being smart but just saying. I hear the One X has great battery life. I also hear it has bad battery life, Tegra or S4. I hear the same story for both. I never owned the phone so I wouldn't know. It already comes with a 2100mah battery standard. That's juice right there. Think of your own realistic use of a phone and see if that's enough for you. Then get it in your hands and give it a week and put it through it's test and confirm for your own liking. No phone is the same physically. Yea, Sammy phones aren't made of iron, but unless you work at Home Depot or some battle ground, then tell me what phone will survive a drop from the ear on the sidewalk? No phone. It might just still function if your lucky but the screen for sure will be broken to where your reflection wouldn't look strait.
Everyone has their own personal satisfaction but I really dislike it when it's pity things, or based off what others say in reviews. Try it for yourself.