logging in at 35000 feet over usa.

[Rising1000]

1. was flying from Toronto to Dominican Republic while flying over usa tried logging into USA network.  I could not was this possible or perhaps i was going too fast or was too high? Tried to access forum while in Dominican Republic but it was hard to do as I had no cellular network. 

2. 

[Yummy]

Do you REALLY expect cell towers to send signal 10km above the earth?

Unless airplane offers such service (for a big charge) there will be no mobile service in a plane way above the earth.

[BKNS27]

@Rising1000 

Shouldn’t you have your phone on airplane mode while in the plane?

[hairbag1]

@Rising1000

PUBLIC MOBILE has no service outside Canada, Mexico and us. You won’t have service in DR. 

[slusagm]

1. not possible to get mobile signal when the flight is in full height.  
Mobile signal can typically reach up to 10,000 feet (approximately 3,000 meters) in altitude only.  And at you said, you are at 30,000. 

So, usually, you will loss your mobile signal within 2 mins after take off