4G_LTE signal is the fastest signal in US at this point. Is there much difference in speed in 3g to 4g? Yes 4g is much faster.

So keep in mind just because you are purchasing a 4G capable phone your network providers signaling equipment may not yet have the capability of 4G/LTE. Example-where I work in Marysville-Sprint does not have 4G so best you can do is 3G or WIFI.

http://opensignal.com/coverage-maps/US/

Samsung Galaxy 5—great phone –like said the features are out there already for the most part the improvements of antenna, screen res and size, battery life, camera…

Choosing between S4 and S5 not a whole lot says I’ve got to have that phone-it comes down to device cost difference and the $35 re-stocking fee =they kinda got ya.

Keep in mind if you do not carry the extra $ insurance and you do lose or destroy a phone, you can always request a refurb'd phone (like device) to replace without renewing contract or paying full retail