Change instance type from was cli

aws ec2 modify-instance-attribute --instance-id i-0c21f4ff53460944d --instance-type "{\"Value\": \"t2.small\"}"

aws ec2 start-instances --instance-ids i-0c21f4ff53460944d

aws ec2 run-instances --image-id ami-xxxxxxxx --count 1 --instance-type t2.micro --key-name MyKeyPair --security-group-ids sg-903004f8 --subnet-id subnet-6e7f829e