Is battery drainage a symptom of unlocking an iPhone?

Over the weekend, I had asked AT&T on unlocking instructions for my iPhone 4 [I'm out of contract so I'm eligible] And no, this wan't unauthorized, it was all authorized by AT&T. Anyways, since then, I noticed my battery drain more frequently. I use my phone the same way. Nothing except the unlock on the phone changed. Still, my battery drains more than usual. Instead of the phone lasting the whole day, I end up charging it at around 5PM. But it is an iPhone 4.Is the battery naturally wearing out or is the unlock draining the battery?

Now that its unlocked are you receiving any service? Like is the phone trying to search for cell service everywhere or are you using it normally, like Wi-Fi only.

Also did you restore the phone after unlcoking? Upgrade? Apple makes a ton a changes during these restores and upgrades so its possible a couple settings got changed ans its affecting your battery life.

Other than that i would guess your battery life would be better after unlocking a phone so it may be the battery wearing out but that sounds unlikely.