The carrier always prefer to have the called number and the calling number in E164 format.
If the called number is not in E164 format and the ANI is not a valid ANI, call termination is not guaranteed.
Customer should always write the called number in E164 format (without a + sign as Cyara adds it automatically.)
For example the correct called number for US is:
18558434662 where 1 is country code and 8558434662 is the called number.
Similarly, the ANI that you are using should be a valid ANI and the format should be E164.
For the ANI field, you can add a + sign
In this example, +16508256802 is the ANI used.