The time before last when I charged my phone, I read the message that (from 25%) full charge would be achieved in 4 hours 38 minutes. On previous occasions it has always announced an hour and a half to full charge. I managed to find the setting for fast charge (I'm afraid I can't now remember where I found it!) which was actually set on fast charge. All I could think of was to turn OFF fast charge and turn it back on again. I plugged in the charger again and was happy to see a charge time of one and a half hours again. The last time I charged it, a couple of days ago, I received the same 1 1/2 hour predicted charge time. Unfortunately, this morning when I put it on charge again I saw the predicted charge time had reverted to 4 1/2 hours. I haven't changed any settings. Can anyone please explain why the phone appears to have turned off the fast charge facility?