It would be nice if you could copy and paste a phone # into the customer record.
Speaker Kits made for you and nobody else
The phone number field is designed to store phone numbers consistently as xxx-xxx-xxxx. You can paste a phone number in this format into the field. Or you can type the number and the -'s will be inserted automatically. If however you paste a number not in this format you will receive an error message prompting you to insert the dashes.
If we allowed any format in the field phone numbers would not be consistent. So it is a trade off either way. At this time we do not have plans to change the format, but will add your requests to the queue.