Samsun Galaxy s3 and samsung contacts wont work

[Pat Sharkey]

I just added sms pro texting so I could send more than 10 texts at a time.
Now my contacts on my s3 does not work when I try to edit, add or make changes.
Any advice.

 

[b2d2]

"Now my contacts on my s3 does not work when I try to edit, add or make changes."

That's an awfully broad paintbrush. Can you narrow it down a bit? Error messages? Screenshots?