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mmastrac
Now I'm curious: how do you send a class 0 SMS to a phone?
edent
It's pretty easy - all you need to do is change the Class of the SMS PDU to 0. I've written a short tutorial in Python showing how it can be done: http://shkspr.mobi/blog/2012/06/raspberry-pi-python-and-3g-d... In this case, I'm using a basic 3G dongle and Raspberry Pi - it should work on any device which allows serial port access.

A few phones have the capability via 3rd party apps - they all seem to be ancient Nokia & BlackBerry devices.

Amusingly, iPhones don't (or didn't) display the sender's number on Flash SMS, so you could text very realistic looking prank messages like "This phone has been recalled - please nearest Apple store" etc.

Flash SMS is a bit like Push To Talk - one of those standards which never quite took off the way it should.

lloeki
My bank does send Flash SMSes for 2FA codes as an optional fallback to the chip+pin-card based 2FA keypad, that does both time-based and challenge-response to authenticate the transaction, and is mandatory (i.e no SMS fallback) for adding people's IBAN and outbound transfers.
edent
Oh! That's a good idea - prevents them from being saved (unless you take screenshots, I guess).
arjie
Old Nokias can do this too. I know a Nokia 3110 can, for instance.
sixothree
Jokes on you. My Nexus 4 barely ever receives text messages correctly.
barrkel
To a first approximation, the only text messages I get on my N4 are from Google's verification service, but I've never had one received incorrectly - or noticed a failure to receive one.
csmuk
What actually happens? My wife was thinking about getting one and uses SMS all the time so this could be a deal breaker.
therobotking
I had a Nexus 4 from launch until the Nexus 5 and never had a problem with receiving or sending SMS messages.

I've never heard of it being a common problem either. Your wife should go ahead and get the phone if she wants one.

kiallmacinnes
Yep - Same here, SMS's have always been perfect. I reckon the GP poster is simply trying to stir..
csmuk
Thanks both. I suspected this.
phaer
I can add one more report: My Nexus 4 has no problems with receiving or sending text messages. Maybe the OP uses a non-standard radio firmware or something?
mitchell209
Hell, I had no problems with SMS and I was using Facebook Messenger as my default SMS app. I had no problems with the few days I used the stock messaging app.