How to change com port to lower no ?

Dear supporter wheever i try to unlock my samsung ,,,,always show on CONNECTING PORT 708 or above ,,,creating some connectivity issue ,,,,,wherease i want to downgrade com port to lower no maximum com 2 to com 20 ,,,,,but i dont know HOW CAN I DO IT ?



i will apretiate ,,if any valued member could guide me to down port ,,



wating for kind replies,,:confused:

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