Hi Laraine and Bronwyn,
We have just returned last week from walking Le P to St. J Pied De Port.
Took two mobiles;
One for "emergency or tex messages only" from back here in Oz , the other unfortunately was locked into Optus .
A SIM card from Orange does not work if your phone is locked into another server so for 29 Euros we were given a phone [ Samsung ] and 5 euros credit. We added another 20 euros and this is what we used for booking ahead if required. There was always a french speaking person nearby , especially at night. It lasted us the walk which took 5 weeks.
Eventually you will be very close to throwing them away , thats what this beautiful path does.
In relation to buses , you have a better chance of getting a train here in Melbourne [ impossible] than planning to use this mode of transport in France.No problems in the bigger towns but they are few and far between. Just take an extra day and enjoy. When you return home you will know what this last sentance means.
If you have to then the baggage transport vehicle is readilly available.
Have a great time and don't plan too much,
Keep well,
David