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Does Anyone Use their Phone without a SIM Card?


This is something I've been thinking about for a while. I've decided to get a Pixel with GrapheneOS as my next phone and I'm trying to decide the pros and cons of putting a SIM card in it. Convenience vs privacy, public wifi with a VPN vs using phone data, etc.

I can't get a SIM card where I live without ID and I'm looking to reduce being tracked as much as possible. Does anyone else do the same thing?

in reply to freedickpics

I have a phone with no sim that I use sometimes over wifi, but I have another one with a sim that I sometimes use as a wifi hot spot for the no-sim phone.
in reply to freedickpics

I use phones without Sims, but it's because I'm cheap and I have a collection of weird phones.
in reply to freedickpics

My kids have phones with no SIM card; they can call 911 and they can use WiFi when in range; I have them set up with a VPN to home, so that’s the only connection any hotspot sees.
in reply to freedickpics

i have my boss's old one here that's pretty much only used for testing mobile web and for its camera. i use a 'dumb' phone, and its camera doesn't work (was crap-tier anyway when it did). i think it has 10 on it. it doesn't leave the office, doesn't get used that much, and has no google account linked to it anymore since it was totally reset when it was replaced earlier in the year.. the inability to use google play to install a few apps reduces its usefulness. i got f-droid on it but not everything is available from it.
in reply to freedickpics

I do have a SIM card for emergencies but I keep it on flight mode 100% of the time.
in reply to freedickpics

This entry was edited (5 days ago)
in reply to freedickpics

You can call emergency services even without a sim, so you might not be as disconnected as you would think
in reply to bananabread

Yes, the cell tower can see the unique IMEI of your phone, so as long as the cell radio is on, the cell company can at least see what tower that IMEI is in range of. And if they can track the purchase of the phone to you, then they can identify your signal.
in reply to colournoun

That isn't entirely true. While a phone without a SIM can still listen to broadcasts, it never registers as a subscriber because It's missing a IMSI. So no, without a SIM you are indeed invisible to carriers. It's a bit like screaming into the woods - someone might hear you if you do that, but if he doesn't scream back, you have no idea he's there.

The only exception to this if you're actively calling emergency services - in that case, your phone will attempt an emergency attach to any network it can find, which is the point where the carrier of that network could see your IMEI. However, apart from that, you are indeed completely invisible without a SIM card.

in reply to freedickpics

I have a data-only sim, otherwise no sim for phone calls. My phone stays in airplane mode nearly always. I use voip to make and receive calls when wifi is an option. Most voip providers, afaik, are not privacy respecting including the one I use. Planning on switching to jmpchat someday which is all about privacy.
in reply to freedickpics

I have a Pixel 7a with GOS in airplane mode, with WiFi only. My old phone with the sim inserted is on Lineage OS and hasn't fully (has a case of occasional ghost touch) died yet.
I only use the old phone for cellular telephony.
in reply to freedickpics

That's a strange argument, why do you and lots of people replying here believe they are NOT tracked over WiFi which are themselves relying on ISPs?

If you don't trust your ISP why would you trust random ISPs more?

in reply to utopiah

what do those public wifis see? randomized mac addresses nowadays, mostly. that compared to your constant IMEI and the KYC the company submitted you to..
This entry was edited (5 days ago)
in reply to freedickpics

in reply to freedickpics

I did for awhile but it was stock android and I was not doing it for privacy reasons. I just see no reason to pay for something I don't particularly want. I use a talknow sim currently but mostly use it on wifi.
in reply to freedickpics

I tried, but could never find anything that would work as a VOIP subsititute. So now I have a pixel that does everyrhing except phone calls. Getting close to just giving up and slamming a sim in it because at least it's a little better than stock android.
in reply to freedickpics

Not having a SIM-Card in your phone is like having a tank without a main gun - it drives, but it can't really do what it's supposed to do. I don't think that it's a good idea. Also, not having a SIM-Card doesn't make you invisible - only airplane mode really does that. Without some kind of network connectivity, you have an expensive, glorified brick that can make photos, play games and lets you listen to offline music.

Also, I'm wondering what exactly you're trying to achive. Get a private OS like graphene, don't install any google services, have anti-tracking protection installed into the browser (or use a safe and sane browser by default) and you're good.

Not having a SIM doesn't do anything for you except hiding from your carrier, however, if your threat model involves you being worried by being tracked by your carrier (and by extension, the feds), you're in really hot water already and you're probably better off with detaching yourself from the modern world.

This entry was edited (4 days ago)
in reply to freedickpics

I do use my SIM card in a dumbphone, it's good for mental health too
in reply to freedickpics

When I got a new phone a while ago, I put my sim card in the new phone and kept using my old phone on wifi only.