Sigma Software v1.21.01 released! ZTE-G R621 is added to the list of supported.
Dear Users,

Just an hour ago we've received a package from Dominican Republic and
decided to put out a new software build that would contain a solution
for new ZTE phone model.

And here it is! We are glad to introduce new version of Sigma Software v1.21.01!
This time we've developed the following new solutions:

  • First in the World ZTE-G R621 (MT6252) phone model was added for unlock purposes via patching.
Download Sigma Software v1.21.01

Best Regards
GSMServer team