Hello! First of all, you should verify whether the phone number you dialed is the entrusted number of Galaxy Securities (check it on the website of Galaxy Securities). If it is verified that it is the telephone entrustment number of Galaxy Securities, it is no problem to follow the voice prompts step by step after dialing the phone. You can practice the operation several times with the hands-free key of your mobile phone, and you can buy and sell stocks after you are familiar with it. Before you are familiar with it, it is recommended not to buy or sell stocks to avoid losses caused by improper operation.