In Reply to: Is it possible posted by gailo on Tuesday, 30. June 2009 at 18:33 Bali Time:
We have our Pro XL sim cards here in Australia, our friend in Bali has the number and is able over his mobile phone to keep our numbers topped up. As long as he adds a small amount of credit each month it keeps it active. It actually goes into hibernation until we use it again properly but by placing the credit on it it keeps it active. We then pay him back on our return. I believe it is something like every 3 months to add credit but he just does a small amount each month.
I also believe you can add credit over the net on the phone companies websites.