The woman had been watching a football game in her home in Grassau, Bavaria when she fell down and did not have enough strength to get back up, broadcaster Bayerischer Rundfunk reported on Thursday.
The nonagenarian had a telephone within reach, but she was only able to dial a random number to call for help.
By chance, a 60-year-old man from Lower Bavaria picked up and recognized the emergency situation as the woman cried “Help!” into the receiver, police reported.
The man was able to do a reverse phone number search and then gave police the woman's number.
Police were then able to trace the number to the woman's home and get a spare key to get inside from her neighbour.
The 96-year-old was so thrilled to have the police help her up that she offered them chocolate, before watching the rest of the football match.