Hi @nuno437 Thx a Lot this Worked!!!!! "you have to have the old battery first. I tried 2 batteries and I had the same problem you mentioned. Just put the new battery in its place and don't plug the wear of it, instead, you are going to put the old battery over the new battery and plug the wear of the old battery and turn on the device with the power cable on. Once it's turned on unplug it quickly and plunge the new battery wire. I know it sounds silly but I tried it and it worked. I think what happened is that you trick the phone by doing that. Btw, its hard to have the 2 batteries over each other but keep holding them.