Yes. They have the GSM network.
I was told just yesterday that you do, I bought a cell phone from eBay and it wouldn't work w/ cell one and they said its b/c it has to be quad band.
There are many excellent triband cell phones. However, depending on your service carrier, a triban phone will not work in all places. Most Triband phones do not have the 850 MHZ frequency, which AT&T uses in many areas in the USA.Therefore, a quadband phone would be a better choice if you want to make sure your phone will work everywhere in the world.
The format that is needed for a smartphone in the US is a phone which is quadband with a WiFi wireless frequency. As long as phones such as the HTC HD or the Acer F1 have quadband or dual sim cards, there should be no issue with them working in the U.S.
Yes, your cell phone charger will work in Europe.
talking on your cell phone at work
Yes, everything will work, except you'll have to switch your phone (at the place you got it) from US lines to Singapore lines.
Yes it is known for the cell phone tracker app to not work. It's the way the cell phone is made, the model of the phone, it depends what kind of phone it is for the right app to work with it.
Many work phone systems have the capability to forward calls to your cell phone. If they don't, you could get a follow me service to do this.
A cell phone locator can help a person track the location of a phone for free. The only time it won't work properly is if the cell phone is on airplane mode.
Suck it
yes the phone will work in the grand canyon
No - usually the mobile networks will do all the 'hard work' for you.