Due to market situation unlock/hwconfig rebuild for Sony msm722xA-based phones ( st21,st23,st26,c15xx,c16xx ) cost 0 credits from today, positive credit balance required.

Smartcard should have activated standalone unlock/hwconfig for 2010,2011 sony ericsson phones.
You can check if your card have this option by running updater with default username updater/updater.

Soon i'll release new smartcard update and setool2 version, which will support standalone unlock/hwconfig rebuild for Sony msm722xA-based phones.

Update will be free, of course, for users, who activated standalone unlock/hwconfig for 2010,2011 sony ericsson phones.