Hello, at the moment release of the Samsung A205U model in binary 5 security patch is not supported.
Unlock using credits is supported for these firmware versions
OTHER: A205USQU1ASG3, A205USQU1ASG4, A205USQU1ASG6, A205USQU2ASI2, A205USQU2ASI3, A205USQU3ASK1
Additionally, the patch version also matters.
To find out which phones and firmware versions were successful by users, you can follow the link and see the model you are interested in.