HI skunks(ets)

Thinking on a techi scale.

Condition:
You have 2 phones one with a Yu line the other with Safcom line.
Only the Yu line has credit however no internet coverage of the same were you are.
You dont have a watch :-)

Question:
How can you tell the correct time (gmt+3)?

Rules:
You are not allowed to ask anyone.
No other devices allowed except the ones provided.

--
"One who ask questions is a fool for five minutes one who doesn't is a fool forever."