I think the only thing that can be done is to go back to court and charge her with contempt. Not having a phone is a danger to the child...what if you needed to call 911 for a medical emergency? You would probably be able to get the court to order her to maintain a phone and give you the #.
You can try asking the child if they have a phone. The child may know the phone #. Also, if your child is in school/daycare, you can have all the records sent to you. Tell them to send you the student record that lists the child's current information. She should keep the child's school informed of the phone #.
Good Luck.
longship
SM to 2 boys
BM to my little guy
DH - my wonderful husband
You can try asking the child if they have a phone. The child may know the phone #. Also, if your child is in school/daycare, you can have all the records sent to you. Tell them to send you the student record that lists the child's current information. She should keep the child's school informed of the phone #.
Good Luck.
longship
SM to 2 boys
BM to my little guy
DH - my wonderful husband