A:AnswerFeatures like HD Voice are usually specific to the carrier versions of the system software, so these might not be available. You should consult with AT&T. ^Tim
A:AnswerYou can use the trade-in estimator at the bottom of Best Buy's website if you want to see what the trade-in value might be. I went from an S6 Edge to the unlocked S9. My trade-in value was estimated at $30, but I have LCD burn in damage on mine. Yours might be higher. I'm not sure how much better the price of the S9 will be, however.
A:AnswerYou can trade in your old phone any time. The trade-in amount is put on a gift card and you can use it whenever you like. If you want to use the trade in amount toward the price of the new phone (which answers your second question), then you'll have to do everything at once in the store.
A:AnswerHello! We appreciate your interest in our products. That is a USA based single SIM unlocked device. Typically when a device is dual SIM, that will be specified. Please keep in mind that USA devices are designed for use in the USA and we would be unable to guarantee that you would be able to use it without complications in Nigeria. I would suggest you look for an international unlocked dual sim version of the S9 as that would most likely be the version you will need to use in your region. I suggest you keep an eye on your regional official Samsung page at https://goo.gl/yd4NS5 for information on devices being released in your region. We hope this answers your question and helps you with your purchase decision. ^Rod
A:AnswerThe pre-installed languages are as follows:
Spanish
German
French
Italian
Portuguese
Vietnamese
Korean
Japanese
Chinese Mandarin (simplified)
Chinese Mandarin (traditional)
A:AnswerIt will be available in stores on the launch date, and the lines will be quite long (I used to work in mobile). Don't be in a hurry when you purchase the phone, the activation alone may take half an hour, depending on your carrier.
