Complex sentence: This is not the case with LEO services: even if the signal is blocked by an obstacle, one can wait a few minutes until another satellite passes overhead, but a moving LEO may drop a call when line of sight is lost.
Split into simpler sentences: This is not the case with LEO services: even if the signal is blocked by an obstacle, one can wait a few minutes until another satellite passes overhead. Although, a moving LEO may drop a call when line of sight is lost.