Aside from the observations concerning how or how NOT to use this forum regarding "lost" pilgrims, I would encourage every pilgrim to pre-plan occasional "assurance" contact with loved ones and friends.
For example, if you were going boating (a float plan), traveling to a foreign place (contact info), or going off into the wilds somewhere (a route plan and itinerary), this is a more-or-less standard practice. These advance notices allow people to find you should you get lost, injured, or otherwise go unexpectedly "off the grid." This is particularly important for women planning to do a Camino solo.
Personally, I am expected to phone my elderly mother at 10:00 am each and every Sunday morning (her time) from wherever in the world I happen to be. This can be dicey if one is, say in Thailand or Malaysia. But from Europe, she is only six-hours behind me. So, I set an alarm on my mobile for the appropriate day and time. Sometimes, I get caught up in things or do not have a strong enough signal to call. She has come to understand that I will call as soon as I am able and does not panic, as long as I contact her that day.
Also, I quite agree with people who make the case that the Camino is a time for getting away from the intrusion of modern conveniences. The Camino should be a time for quiet contemplation, enjoyment, and living in the moment. I use my devices as tools. They are available when needed, but used constantly.
My practice is to turn off all the electronics, except a camera, until I arrive at my daily destination and accommodation. Then and there, I power up the mobile to check for any important texts. This avoids distractions during the day, and extends battery life. Communications with "the world" are, thus, on my terms. I usually only check for messages once each evening.
My family and close friends are informed before I leave home that sending a text message is the best way to get a message to me. Later, and if I can find a strong enough Wi-Fi signal, I will use my iPod Touch to check my e-mail.
Also, before I leave, I set a "vacation" auto-reply message on my e-mail service provider's server, so everyone who sends me an e-mail gets a standard message that says "I am away on Camino from (date) to (date) and to please not send me e-mail for the duration." After a few days, this usually reduces e-mail to adverts and news alerts I set up previously, plus a very few messages from others who know I will reply to them as I can. I typically delete the informational only messages en masse as soon as they drop into my local "in box." For the duration 0of my Camino, I try to minimize intrusion from the outside world.
All of this said, part of having a worry-free Camino is reassuring those you leave behind that you are okay. I suggest that it should be part of the standard pre-Camino planning you make at home.
A simple SMS / text from you to one family member or friend that states "Reached (town). All fine (Your name)." should be enough to provide assurance that you are okay. I found myself doing that every few days, as I have elderly parents and a sister who cares for them. They followed my progress on a map of the Camino I provided for them.
Also, this preempts people "back in the world" from freaking out because they are having text or e-mail withdrawal from your normal communication pattern. Your failure to communicate regularly is not the problem.
Remember, it is not YOU who has the problem. It is usually the folks you left behind who get anxious.
I hope this helps.