Fill in basic information to open an mDSP account linked to your APX account.
2.1.After opening mDSP account, you can transfer your APX balance to your mDSP account by clicking the highlighted button "Transfer Balance to mDSP!"
Transfer amount should be N*$100, N>=3.(i.e. $300,$400,$500...)
2.2 You can also top up your mDSP account directly：see more at payment-method.