My soney ericsson arc s will not turn on it comes up with soney then xperia and then carrys on doing that until i take the battery out i need help i havnt even used it yet help......

Whats wrong?

turn phone off,take battery out and let it cool off like 5 minutes then put it back together and calibrate it and everything thing will be good

Hi, You can get the unlock code for a Sony Ericsson Xperia Arc S from www.onlinegsmunlock.com at affordable cost with easy unlocking guide. Good luck mate.

Make sure every setting is not on silent.

Download Battery Booster from play.store.com

Buy another one.

Batteries do not last forever, they often need to be changed, Looking at the specs of this phone the battery MaH is pretty low for the type of phone that it is. Android phones can drain batteries quite fast, and depending on how long you've owned the phone.
You can purchase a replacement battery, or.. An Extended battery can help keep your phone running for longer periods of time. (http://www.amazon.com/ericsson-Replacement-Lithium-Ion-Extended-Battery/dp/B005PFOGIW)

what is w key

try to update your software using updater servise sony ericsson