Rich Communication Services Universal Profile (or Chat as Google likes to call it) is all about interoperability. The end goal would be for ALL carriers world wide, to standardize on RCS as their carrier provided messaging platform (instead of SMS / MMS). There are a lot of moving parts that will have to come together for this to happen, but some of those parts are starting to come together.Continue reading RCS Carrier Interoperability
Maybe Google and Samsung are working together to make RCS inter-operate, but they shouldn’t HAVE to! And even if they ARE working together, that shouldn’t be the news here! We should be focusing on the fact that Rich Communications Services (RCS) Universal Profile (or Chat as Google wants to call it) is INTENDED to inter-operate between clients AND carriers!
Here are a list of dialer codes that can be used with Google Fi. These codes shouldn’t be used unless you are aware that they may impact the way your Fi phone switches between carriers.
The following options are only available for “Designed for Fi” phones. They will not work on the iPhone or “Compatible with Fi” phones because they are T-Mobile only. See which class of phone you have here.
|Alpha Code||Dialer Code||Description|
|FI AUTO||*#*#342886#*#*||Set carrier selection to automatic.|
|FI NEXT||*#*#346398#*#*||Select Next Carrier|
|FI SPR||*#*#34777#*#*||Select Sprint for 2 hours|
|FI TMO||*#*#34866#*#*||Select T-Mobile 2 hours|
|FI USC||*#*#34872#*#*||Select US Cellular 2 hours|
|FI SIMON||*#*#3474666#*#*||Select Three (UK only)|
|Alpha Code||Dialer Code||Description|
|FI INFO||*#*#344636#*#*||Get information about the current network.|
|INFO||*#*#4636#*#*||Get general phone information.|
|DEBUG||*#*#33284#*#*||Phone Debug Options|
|PRL||*#*#775#*#*||Force download of Preferred Roaming List (Sprint)|
|PRL||*228||Force download of Preferred Roaming List (US Cellular)|
|FI ROAM||*#*#347626#*#*||Turn on International Roaming|
UPDATE: As of the 11/29/2019 Google Fi announcement, this article is pretty much old news but I’m leaving it here for reference.
I’ve seen the “can you use Project Fi with an XYZ model phone” question over and over. Invariably someone (or several someones) will reply “yeah, it works”. And while this answer is kind of / sort of technically correct (with caveats), it’s misleading! When I see this I imagine quotes around the word works… it “works” – unfortunately, a lot of people take it at face value. Continue reading Fi on a non-Google phone is like mowing your lawn with a weed eater….
What does the “KEY” mean?
I’ve seen several new (and some not so new) Project Fi users asking “what’s a key?” So I thought I would take a crack at explaining what it is and why you should care. Continue reading Project Fi – What is a “Key” and why should I care?
I’ve always been intrigued by Amateur Radio. I’m not specifically talking about HAM radio even though that is certainly part of it.
As a boy I traded a telescope for a OLD “world band” radio and spent a lot of time doing stupid stuff like setting the EXACT time on my watch to the WWVB signal. Honestly, there wasn’t really much to listen to in North West Arkansas in the 70’s on a 50’s era radio, but I tried. Keep in mind that we didn’t have the internet, so the only way you could find a station was to slowly tune through the bands listening for something that wasn’t static – which meant you had to tune over the station WHILE it was broadcasting (which can be a bit of a trick when only a few stations broadcast 24×7). Of course you COULD buy a book or subscribe to a magazine that listed some frequencies to try out if you had the money to spend.
Later, I found a copy of an Amateur Radio Relay League (ARRL) book in a thrift store and spent hundreds of hours looking though it, dreaming about how cool it would be to be able to actually do the stuff they were talking about. Unfortunately, the cost of getting into amateur radio was a deal breaker for me.
In high school I actually went “all in” and bought a CB radio with “significant” antenna and got my CB license (yes, they actually licensed that back in the day). My call sign was KAKJ4409.
Since then I’ve always found an excuse NOT to get too involved in radio (yeah, I’ve bought a low end Radio Shack scanner, the not so occasional FRS and digital $35 world band receiver at Walmart, etc. – but I’ve not gotten “into it”). I’ve considered getting my ham license, but I’ve always found an excuse not to – I didn’t want to learn Morse code, the radios were too expensive, etc.
By this point I bet you are wondering where this is going, well… I’ve recently gone down the Software Defined Radio (SDR) rabbit hole and I want to document my decent. For those of you who don’t know, SDR uses computer software to decode a digital version of the radio spectrum. To do this, you need a device to receive the radio waves and convert them to digital. Until fairly recently this piece of equipment was incredibly expensive and really only available to the military and research folks, but not any more.
Several years ago, several companies started producing hobby SDR cards. Then a security researcher figured out that a USB TV tuner that costs about $15 can function as an SDR radio when paired with the right software. This is the specific rabbit hole I’m headed down.
I’ll post follow up articles as I work my way though the jungle of open source SDR software and I’ll try to leave enough bread crumbs that you can follow my path if you find yourself so inclined.