my iphone lock screen frezzes for 5-10 sec until it again gets unlock

Greetings, ritwikfromratlam!
Thanks for reaching out to the Apple Support Communities! It sounds like you have an issue with your iPhone lock screen freezing and I am happy to assist! Please check out this article with the steps to follow If your iPhone, iPad, or iPod touch won't turn on or is frozen. This article will also give you the best steps to take if you continue to have issues with the lock screen freezing.
Cheers!