I could do with some help from some what's app experts. My DP has admitted to exchanging messages with a work colleague after I grew suspicious. I tried to look at the messages but they were deleted. He then 'dropped his phone' which has basically resulted in the phone and sim being thrown away - I know they have gone because I was with him when he gave it to the bin man. I have managed to obtain another SIM card for his old number and he now has a new one. My question is 1. Is there anyway of retrieving the messages off a new phone and new sim on his old number and 2. Is there anyway of monitoring what he is doing on his new phone in WhatsApp ?