Receive and deliver

We are trying to receive and deliver via the handhelds on the same trip, our couriers will typically be out of network range while making their receipts/deliveries.
We can get them to deliver stuff, or receive stuff, but the minute that they try to do both (again out of network) they lose everything in the handhelds.
Is there a recommended way of doing this.  Lawson has told us to give each of our couriers two handhelds, one for deliveries and one for pick-ups.
NOT AN OPTION!