DOES THIS DEVICE NEED A SIM CARD: Yes it does Being that this device is T-Mobile Branded it will work on any active T-Mobile Nano size SIM Card, The sim card does come included you will need to contact T-Mobile to activate your complimentary Sim card.
WHAT NETWORK FREQUENCIES ARE SUPPORTED BY THIS DEVICE: The Phone will support the following 17 Frequency Bands: GSM 850 900 (E-GSM) 1800 (DCS) 1900 (PCS) UMTS B1 (2100) UMTS B2 (1900 PCS) B5 (850) B6 (850 Japan) B8 (900 GSM) LTE B1 (2100) B3 (1800 +) B5 (850) B7 (2600) B8 (900) B28 (700 APT) B38 (TD 2600) B40 (TD 2300). Please contact T-Mobile (prior to purchase) and inquer if they support these bands in your area to ensure the device will work Properly.
SO HOW LONG CAN THIS PHONE LAST ME: in the box, you will find a NON-Removable 2,600mAh battery that lasts according to the manufacturer for 13-17 hours of continuous streaming and 672 hours of standby.
WHAT DOES FINGERPRINT SECURITY MEAN: So this phone has a Fingerprint sensor to secure and to ensure your personal information always stays safe, this is the top of the line and safest way to keep your personal information safe Android 7.1 (Nougat), upgradable to Android 8.0 (Oreo) with HTC Alexa, Does Not have 3.5mm Audio Port, Comes with Noise Cancelling USB C Headset.
IS THIS DEVICE UNLOCKED: No. this device will be locked unto the T-Mobile Network for the first 2 Years after that period you can contact T-Mobile to remotely Unlock the device. THIS DEVICE WILL ONLY WORK ON THE T-MOBILE NETWORK OUT OF THE BOX.