There are three types of criminal trials in India - warrant trials, summons trials, and summary trials. Warrant trials are for offenses punishable by more than 2 years in prison and follow the most formal procedures. Summons trials are for offenses punishable by less than 2 years in prison and have simplified procedures compared to warrant trials. Summary trials are for offenses punishable by up to 6 months in prison and involve the most streamlined procedures of the three types.