Why would either of them turn the phone on for an hour and drain the battery, when they presumably turned it off quickly to save battery in previous instances? If Lisanne, why didn't she make a call attempt or turn it on in any of the previous days? No PIN at least does make sense though if it is Lisanne. If Kris, why didn't she make an emergency call attempt or enter the PIN, like she had been doing the first few days? Why didn't she use the phone in any of the previous days if it clearly had enough battery left? Who do you think was accessing the phone at that point? It then wasn't turned on again until 5 days later on April 11th, for about an hour, with no PIN entered. According to this, her iPhone was used or turned on to make call attempts or to check signal every day until April 6th.