Simplify the following text for a Grade 6 native English-speaking person.
Original: At 12:07 pm the following day , Knox called Kercher 's UK mobile phone , ringing for 16 seconds ( Knox testified Meredith always carried that phone in expecting calls about her mother 's recent illness ) .
Simplified: When Knox had called Kercher ( at 12:07 pm ) , her phone was found , ringing and ringing , in some garden bushes .