During their roll out of devices, the MMO received feedback to suggest that some devices may not be compliant with the MMO’s Type Approval specification.
Yn ystod y gwaith o gyflwyno’r dyfeisiau, cafodd y MMO adborth i awgrymu na fydd rhai dyfeisiau’n cydymffurfio â manyleb Cymeradwyo Mathau’r MMO.