Use 4554 as Microsoft account security code. Go passwordless with Microsoft Authenticator aka.ms/authapp
From Telstra
Hi CompanyAO,as requested, we've updated your contact details. If you didn't make this request or don't know why you're getting this SMS, please Message us livechat.telstra.com/email:update:details
You have requested to bind/update mobile number for your Garena account. OTP: 937510. To protect your account, please do not provide the OTP to others.