Their frequency range of the LTE operator is on the same band than the satellites of GPS. Worst case you cannot use the Google Maps any more. All the other services that use GPS will not operate as well. With a little luck the frequency of Glonass is not blocked. Glonass is operating on up to 1610 MHz. Nevertheless for that you will need a new smart phone like Apple iPhone 4S or Motorola Droid Razr.
Thx to Santa. He brought a Motorola Droid Razr on Xmas too me. 😉
The orign story here: