After she flees her home, Helen's phone changes from a cordless phone to a smartphone. When the smartphone screen is seen, it says "Home" indicating she received or made a call from her home phone, which was the cordless phone she had in the prior scenes.
Helen answers a cordless phone and eventually runs out of the house. She keeps listening on it even though she is well beyond the range of that type of phone.
On the DVD the word "piracy" on the anti-piracy warning is spelled "priacy."
Kraviz tracks her to the hotel because she has his gun. Later he can't figure out where she's going but she pulls a gun on the guy at the gas station. Either she acquired another gun or he should have been able to track her.
While running, Helen steps in some glass and drops the phone while the caller is still talking, yet she follows the instructions she could not hear perfectly.