Huawei E303s Unlocked USSD not working

[HuaweiDongle]

Hello every body,

I have recently unlocked my Huawei E303s GSM Modem and i have installed Mobile Partner 21.
I have tested USSD and SMS (Send and Receive) which work fine on the Mobile Partner, but when i tried to test USSD on Hyper Terminal with AT COMMANDS i got CME ERROR : 100,

how coud i resolve the problem please ?

 

[ginggs]

I have tested USSD and SMS (Send and Receive) which work fine on the Mobile Partner, but when i tried to test USSD on Hyper Terminal with AT COMMANDS i got CME ERROR : 100

Paste the full AT command you sent here.