What proof is needed to convict theft in absence of direct evidence?

I went to store to purchase some items. Some stranger was standing next to me at store. Next day, when I went to the same store, that random stranger is blaming me for pickpocketing his mobile saying I was the only one standing next to him. He doesn't have any direct evidence nor any eyewitness. My question is, what all evidence will be required in absence of direct evidence to prove theft beyond reasonable doubt and to get me convicted. Please list all the evidence required by him to prove theft.