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I went without a phone number for a week - here's what happened

I have a theory that phone numbers are becoming obsolete. To test this theory, I performed a little experiment. For one week I used my phone without a SIM card to see what would happen. Did my phone stop working? Did I realize it was impossible? Not at all – but things weren't exactly simple, either.

androidpit facebook messenger vs whatsapp vs telegram
Will any of these help kill the phone number? / © ANDROIDPIT

The state of play

First, let's set the scene: you're out having some drinks with friends and you're chatting to someone at the bar while waiting to order. Things are going great: you're hitting it off. Before you turn to take your drinks back to your table, you ask to swap details. But how do you do it? It seems to me that more and more you'd give them your name and they'd add you on Facebook, where you can pick things up later (and do more than a little snooping), rather than giving them your phone number.

Facebook would like you to believe this, and, to some degree, I do.

facebook world map 1
While Facebook connects millions, the Public Switch Telephone Network connects billions. / © Facebook

Facebook's latest prediction for the future of the telecom industry is the extinction of the telephone number. VP of Messaging Products, David Marcus, posted a blog entry touting the 800 million people who use Messenger every month and citing the benefits the app has over traditional SMS and texting, such as the ability to share photos, videos, your location and, of course, stickers.

With the increasing prevalence of messaging apps like Facebook Messenger, text messaging does seem to be quietly sliding out of fashion, particularly in the US, where data plans are broad and affordable – but is that really the case, and does it mean we can go without phone numbers?

A little history: what is a phone number?

Phone numbers began, in the 1870s, as a way of connecting a caller to another fixed-line telephone. You would orally communicate the number to a switchboard operator, who would then connect you to that line, which was fixed by geographical location, hence why numbers began, and landlines continue to begin, with area codes.

1896 telephone
Hello, Central. / © Public Domain

With the proliferation of mobile telephones, these numbers no longer indicated a geographically fixed line; your smartphone now communicates with the nearest tower, or pair, or even trio of towers.

Today, every phone number, whether a landline or mobile phone, is connected through the Public Switch Telephone Network (PSTN).

While the network is old, it allows for extremely fast connections, and its user base is vast – far more vast than Facebook's global reach.

There are almost seven billion cell phone subscriptions around the world. How many individual users this boils down to is likely to be significantly fewer – Ericsson estimated the figure at 4.4 billion as of late 2012 – but the fact is that the number of cell phone users, and, therefore, PSTN users, simply dwarfs the 800 million Facebook Messenger users. 

connection speed
Wi-Fi and wireless networks like LTE are still not as reliable as good old wires for making a call. / © ANDROIDPIT

The first victim of life without a phone number: mobile data

Apps such as Facebook Messenger, Hangouts and Skype, which are called Over-the-Top (OTT) services, rely on a data connection – either mobile (your 2Gs, 3Gs and 4Gs) or Wi-Fi.

Without signing up to a carrier and a data plan, which requires a SIM card and phone number to be assigned to you, you're not going to get access to mobile data.

Without my phone number, I had to rely on a Wi-Fi connection, which was hard to come by when I wasn't at home or in the office. Not only that, but there is only a handful of messenger apps that allow for SIM-free use.

The second victim: most of the people I care about

When I tried to use my phone without a SIM card, the reduced number of ways of contacting people that I had access to was the biggest drawback; I'm a heavy WhatsApp user, and even access to this requires a phone number.

I tried falling back on Facebook Messenger, Line, and Google Hangouts, which all allow for the usual messaging services and also voice calls, but not everyone I was interested in contacting used one of these services.

google hangouts messenger app
No one I know uses this. / © ANDROIDPIT

Can I live without a phone number?

Well, I survived, but it was a struggle, and one that I'm glad is over.

I was fine with only using my favorite apps, like Feedly and Instagram, when I had a Wi-Fi connection, but actually contacting people was another story.

The ultimate answer is that the PSTN is used by so many people, that you can use it to contact whomever you wish. Given that a lot of my friends are either ditching Facebook or use it infrequently, the circle of people I could contact without a SIM shrank considerably. Frequently, my only recourse was to call people from a landline or send an email, but one of these is increasingly hard to come by, and the other is generally much slower than an SMS, WhatsApp message or mobile phone call.

Looking at the bigger picture, in the US and Europe, mobile data is becoming cheaper and more widespread, but coverage is still not complete, and in the developing world, far fewer people have reliable access to mobile data. On a worldwide level, there's no way the phone number will become obsolete at any point in the near future.

xiaomi mi4i dual simcard
Without one of these, you won't be able to reach the majority of people on Earth. / © ANDROIDPIT

What I learned living in a number-free world

By eradicating the phone number prematurely, as I tried to do, you are limiting your circle of communication dramatically. Alternate services, such as Hangouts and Skype, don't allow you to call to users of other, similar services, whereas your T-Mobile phone has no qualms about letting you speak to someone on Sprint or Verizon.

Until messaging services achieve some semblance of the universality offered by the PSTN, the practicalities of the telephone number are simply too great to be ignored. At the minute, it seems to me that I was looking for a solution to a problem that doesn't really exist yet.

Have you ever gone without a SIM card? Do you think telephone numbers are still necessary? Let us know in the comments.


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  • java 9 months ago Link to comment

    I went without a phone number for about 6 months in 2011, it was fantastic. I pretty much used Google Voice and WiFi connection. Nobody could get a hold of me unless I had a WiFi connection. it was great.

  • I think that I could probably go with just a data plan rather than having calls and texts. I use my phone so infrequently as a phone and I'm always surprised when someone calls me on it.

    My current plan is 200 mins, unlimited texts and 2gb of data for £11, about $15-16 a month and I never come anywhere near the 200 minutes but typically use about 1.5 gb.

    I deleted my FB account about 18 months ago and haven't missed it. I'm a Whatsapp user.

    Maybe because I have a Google Voice number, I've never had any problems calling people in the States via Hangouts on my phone. Not sure what you were doing for it not to work.

    Overall, I think that phone numbers are here to stay for the foreseeable future. Do you want to be contacting the emergency services via FB Messenger or similar app? When you can't be with a good friend or loved one in person, sending a message isn't a good as hearing their voice as you congratulate or commiserate with them.

  • If there is such a thing as "Facebook Phobia", then I have it, because I don't like it, and when I tried to make an account (twice), I freaked out and got hysterical. I get nervous and anxious about Facebook. People will think I'm crazy, but I don't care, I hate Facebook.

  • GT Ohh 9 months ago Link to comment

    Facebook is the work of the devil... lol

  • excellent article and I agree it will be difficult to use a mobile device without a contact/telefone number. But even if contact numbers and sim cards become obsolete and we just use wifi you are still assigned a number on your device actually more than one to be exact called a IP address and MAC address which is also a number that identifies you and your device. So I don't think we will ever be rid of a number... well not anytime soon I guess, as other types of numbers will have to be used to identify you and will have to be used to contact you then like a IP or Mac etc.

  • Ellett 9 months ago Link to comment

    Hangouts Dialer lets a number-less device connect to the numbered world, and you can make an audio call from within Hangouts itself if you'd rather do that. Hangouts also handles all my messaging needs, including SMS to those with numbers.

  • Someone text me last night and I miss that erase that text

  • I dont think thats possible right now cuz our numbers are our identity all what we are in this digitalize world

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    anshul 9 months ago Link to comment

    Someday without number will be possible but it will take time.

  • Mike 9 months ago Link to comment

    I constantly turn my phone off. I enjoy the quiet and I don't feel the need to be in constant contact or communication with the rest of the world.

  • I totally agree wiv the article.

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