Access whatsapp and transfer to new phone Here is an interesting one. I got a new sim card, but never changed it in whatsapp to the new number, now my phone is broken (screen is broken) and I cannot retrieve my whats'app account as I would first have to change to the new number from the broken phone... any thoughts? Btw I don't have the old Sim card.

Here is an article, but it only works if the new sim card has the same number.
If you still have the old sim card, try to install WhatsApp on the new phone using the old sim and it will automatically restore your contact to your new phone after you can can change to your new SIM card.