There is no problem with a "9" prefix. The Printing Mailbox is programmed to handle a number of different prefixes. Just be patient the first 24 hours because the mailbox will attempt a number of different prefixes until it finds one that works. And, depending on how often you have it programmed to phone in, you may not receive notification that it has communicated properly until it goes through that sequence on its own. I suggest you plug it into phone and power, put in ink and paper and send a test message. Then wait a full 24 hours before asking your parents whether they received anything yet or not. If a connection problem does happen, Presto customer service people have the ability to diagnose some connectivity issues remotely.
Presto Insider: Peter Radsliff
CEO, Presto Services Inc.


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