If tracking is the issue, then I can reluctantly agree that we will see more and more of this - can't stop technology but it may be what the customer wants but it is not necessarily what they need.
We do have customers who have access to our trucks tracking in which we give the customer our truck number of the truck assigned to the load, and they are able to track that shipment that is linked to our GPS; but we do not give out the driver information. This works until we have to run a rescue, or drop the load in the yard for local to deliver and we are relied upon to communicate the discrepancy anyways, but now with an agitated customer who thinks their freight is failing because they do not have the whole story. If it is that important, put a tracker on the freight as already suggested and save everyone a headache - if they can re-use dunnage, they can re-use trackers.
For me, part of the bigger issue is giving access of a driver's phone number, expecting them to download an app on their phones then the driver get phone calls from a person they have no rapport with who may not understand HOS, or have the full story on the shipment. This could lead to driver's being talked into breaking laws or add to their anxiety, cause issues with them and their dispatch, cause resentment and so much more. I would lose my sh*t if someone called me other than my boss, questioning me on why I went a certain way or asking why I took a 35 minute break instead of a 30 minute break and so I could never put someone else in that situation. They do not need to be questioned while already on the road dealing with real road situations which should be their focus, while moving the freight as safe as possible and part of that is to not get them upset while on the road.