The range of FRS is so limited that someone in the air could see you before they pick up the FRS signal. I've found that cell phones are rather terrain dependent too, you can go over hills and get a signal and down in valleys and loose it. So something to try would be to hike to high ground and try calling or texting.
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.