For any issues you may experience with your device, please refer to this troubleshooting guide.
Background and Identification
The Samsung Galaxy Tab 4 7.0 was released in May of 2014. This tablet weighs 9.74 ounces and has a 7-inch screen. It also wields a 3-megapixel rear-camera and a 1.3-megapixel front-camera. Some of the features it includes are Bluetooth, GPS navigation, email services, and text messaging. Unlike other versions of the Galaxy Tab 4, this model is connected to a 4G LTE mobile network, along with having Wi-Fi capability.
Click here for the Wi-Fi-only version of the Samsung Galaxy Tab 4 7.0, which has many of the same components; the repair guides will work for both versions of the device.
Take a look here to visit Samsung's support page for this device.
For support from Sprint, check out this link.
If you wish to customize your lock screen, watch this useful video.