

The discovery of the backpack led to new searches along the Culubre. On April 11, the phone was turned on at 10:51, and was turned off for the last time at 11:56.

One report showed that between 7 and 10 April, there were 77 emergency call attempts with the iPhone. After April 6, multiple attempts of a false PIN code were entered into the iPhone it never received the correct code again. Kremers's iPhone would not make any more calls either but was intermittently turned on to search for reception. After April 5, Froon's phone battery became exhausted after 05:00 and was not used again. None of the calls had gone through due to a lack of reception in the area except for one 911 call attempt on April 3 that lasted for a little over a second before breaking up. The first distress call had been made just hours after beginning their hike: one from Kremers's iPhone at 16:39 and shortly after that, one from Froon's Samsung Galaxy at 16:51.
