Got the Tello for Christmas and am having trouble getting it off the ground. Charged batteries and all three showed green. Inserted one into Drone and after initial check, light blinked a fast yellow. Tried to take off and it did go up and the light turned green. Landed ok and when tried to take off again, will not comply. Have inserted new battery and got the same yellow flashing light but this time will not take off. The battery indicator shows red, so I believe the battery and my phone are not communicating. Have turned off phone completely to try a new session and it still does not respond. Any clues on what I should try next? I am using the Tello wifi. Am really looking forward to having a great time with the Drone. I read a lot of reviews and everyone says it is a great little drone.