Hello,
I am brand new to this forum. I found this thread on the internet and was impressed with your knowledge. I want to buy a Ram 3500 Dually with the hi output cummins to pull a fifth wheel that we will live in full time. I need to be able to turn off all the cell/data streaming from the truck for privacy and health reasons. The electromagnetic fields generated by the cell/data activity of the truck are harmful to the health of one of my family members.
My questions are:
1) Can all these external communication activities be turned off? nav, telematics, emergency response, blue tooth, etc. Does this impact the operation of the truck Beyond loosing the functions that are turned off?
2) Will Ram let you do this? Does it impact your warranty? Ability to get insurance?
3) Are there people or shops who do this? if so how do I find them. I am willing to pay for services and or information.
If you have information you could share regarding this I would be grateful. I will share what I learn with this forum in case it would be helpful to others.
Thank you,
Safe and Sound
Sorry for the delay, somehow missed this message and have too much going on to have investigated this for first hand knowledge. That said I can share the following.
First and foremost, whenever attempting anything for privacy or security related reasoning, you need to define your threat model, and you need to build up your own knowledge, or trust in others to have done it. There is no free lunch, so you really need to own your world as much as you can, or feel is necessary. Sadly, that means basically becoming a pro in networking at the minimum, but further can require hardware and software programing and design knowledge that is far deeper than most are willing to dig. At some point 99.999% of people are going to get to a point where they trust or give up digging deeper. Know what you want to achieve before you start so you don't get dragged in deeper than necessary.
Ok that said, here are the answers I can give to the best of my ability.
1. In theory, all these devices can be turned off, but again I've not gone through the steps to do it and confirm yet. Navigation on it's own is a receive signal only, not a send, so turning it off nets you really nothing from the privacy perspective. There is a chance that FCA collects the GPS location data from the nav and sends it through the telematics antenna system, but by shutting off and disconnecting the ability to send, you remove the concern for GPS.
Either way, the best solution is the most complicated, you need a way to get a baseline by measuring RF signal from the truck, then attempting to remove the telemetry system and disconnecting the antenna and measuring the RF again to confirm it's dropped. I recommend a
HackRF One by great scott that requires a computer or phone with supporting SDR app, or as a standalone unit by one of dozens of Chinese made companies with less quality, but it's an all-in-one unit (
example). From here you basically need to find what frequency the telemetry system is sending data on (which can be gathered via searching the FCC directly, or perhaps a general google search). Again, what you're looking for is to see a RF signal from whatever frequency it transmits on before you remove, and none after.
As far as bluetooth goes, that's likely built in pretty deep into the headunit, which controls a lot on these modern trucks. Bluetooth is pretty low energy, and I'm not aware of any real medical conditions that would be an issue with bluetooth but not cell usage. Generally speaking, cell phones TX/RX data in the 700-800 MHz band, and the 28GHz+ bands. Bluetooth operates in the 2.4GHz band, as do things like wifi routers and I believe some 4G/5G phone bands as well. Turning bluetooth off from the head unit should be enough.
Unsure about emergency response, presumably that would use the same system as the telematics integration, and same antenna. So disconnecting/removing that should also remove this.
In terms of impact to the vehicle, you will likely get codes or warnings about the telematics system being turned off, same for the emergency response, but past that I don't know.
2. Ram won't approve of this, but I don't know that they won't "let you", its your property after all. As far as ability to get insurance, I'm not an insurance agent, so I can't speak to that. My general thought is that isn't something they track intentionally, and I'm not aware of them denying coverage for this, but so few people go through the process, it's hard to say for sure. I wouldn't go out of your way to tell insurance you're doing it.
As far as warranty, it really depends. If you're at all concerned with keeping your warranty, the best recommendation is to keep it stock, past that any changes you make
may result in a loss of warranty, at least partially.
3. I'm sure there are places that would attempt this, but I wouldn't trust any of them that claim to. This is really a pretty new thing, and the only people that are interested in this space (outside OEMs and gov) are hackers and privacy advocates. Unless you know someone personally, I wouldn't personally trust anyone to do this for you, because any shop that has the SME to do something like this may also be tempted to replace OEM stuff with their stuff. After all, anyone willing to go to extreme measures must have something they are trying to hide right? Jokes aside, my rec is do it yourself or don't do it at all.
Put the phone, on or off, in a faraday bag. No signals get in or out of that bag.
Faraday bag is def the most ideal solution, past that an OS like GrapheneOS would be the best as you can remove most telemetry, and that which you can't remove can be faked so as to not give your info away. That said, cell towers will constantly ping unless you turn airplane mode on, and if you're doing that, and you've turned off wi-fi, then you basically have a DAP, so may as well just buy a DAP and remove the potential.
Faraday bags are great to obscure transit paths, but not much beyond that.