topic Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra in Android

5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

Shuntfield — Wed, 11 Mar 2020 01:39:32 GMT

Hello

I'm after what could be a simple answer to a complex problem.

I have an Audi, and a Galaxy S10 that uses Bluetooth rSAP to connect the phone to the car, that way the mobile hotspot in the car works a few other things work and I get a better signal in the car because it uses the cars external antenna. Very happy and this is my "must have" function.

So I upgraded to the S20 ultra, which also works as it should as described above.

If I upgrade my contract to one that uses 5G, will this function stop?

If I upgrade I assume I need a new SIM card, again will bluetooth rSAP no longer work?

If I go a stage further and get a 4G or 5G eSIM, again, will rSAP stop?

Essentially I don't want the rSAP function to be spoiled, I dont know if there is a way of being able to test it without going beyond a point of no return. Only to be told theres no way back.

I guess the best way would be to find someone with an Ultra with a 5G SIM/eSIM that can test it in the car, I don't know anyone else with an ultra close by that might be tricky.

Does anyone have an idea if I will lose rSAP functionality with a 5G SIM and contract?

The SIM I have is about a week old because I had to get it changed, it says 4G on it so I assume that its not a "new 5G compatible" SIM.

Thanks

Shunts...

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

Bambino — Wed, 11 Mar 2020 04:14:54 GMT

@Shuntfield As the phone you've bought is so new, I doubt anyone would be able to answer you here, but I also think this is more of a question for Samsung and Audi as well.

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

Shuntfield — Wed, 11 Mar 2020 07:15:12 GMT

I think a wait and see approach is going to be best here

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

MI5 — Wed, 11 Mar 2020 07:31:13 GMT

I wouldn't expect it to be an issue as long as the vehicle software is up to date.

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

Shuntfield — Wed, 11 Mar 2020 13:36:00 GMT

@MI5 I pick up a brand new one in about 10 days time 😉

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

MI5 — Wed, 11 Mar 2020 13:47:55 GMT

@Shuntfield wrote:
@MI5I pick up a brand new one in about 10 days time 😉

That's no guarantee it's up to date, but enjoy it all the same

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

Shuntfield — Wed, 11 Mar 2020 18:02:14 GMT

@MI5 wrote:
@Shuntfield wrote:
@MI5I pick up a brand new one in about 10 days time 😉
That's no guarantee it's up to date, but enjoy it all the same

Maybe, however as part of the PDI it should have whatever the latest software is available installed but as you say its no guarantee!

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

MI5 — Wed, 11 Mar 2020 18:46:58 GMT

Audi might be better than Jag, but I've had 4 infotainment software updates since December !!

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

Shuntfield — Thu, 12 Mar 2020 16:38:34 GMT

@MI5 Uh oh that's either good or bad depending on your perspective!

Though found out today eSIM is not rSAP compatible how I found this out...

I got an eSIM!

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

MI5 — Thu, 12 Mar 2020 17:01:37 GMT

@Shuntfield

Yes, others have reported similar problems with eSim 😞

There were lots of issues with my infotainment system when I picked the car up but the dealer was expecting an update a few days later (update 1).

It then had an update at the 1000 mile inspection (update 2)

Another update because bluetooth kept dropping out (update 3)

and finally another update at the 10,000 mile service which added new features and updated the sat nav maps (update 4).

All is good now though **touches wood

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

Shuntfield — Wed, 18 Mar 2020 05:49:00 GMT

I suppose it's whoever the OEM for they system in the car is.
My guess is that the Audi one be someone like Harmon Kardon which if I'm not mistaken would ultimately be Samsung.
The phone works well in the car, took the shine off it with an eSIM but still I put a regular one back in and its back working fine 👍

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

MI5 — Wed, 18 Mar 2020 07:09:51 GMT

Pleased it's all working for you mate.

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

Shuntfield — Thu, 02 Jul 2020 15:00:51 GMT

I can now answer this myself.

I will update it and mark it as solved, so that if anyone else has the same problems then they can come back here.

Ultimately:

With rSAP - Particularly Audi:

The Cellular and Bluetooth Interface is OEM made for Audi by Harmon - a "Samsung" Company. So in theory there should be little incompatibility with Samsung Devices.

The Samsung Galaxy S20 Ultra (and presumably any of the Galaxy S20 devices) will NOT work with an eSIM in rSAP mode, it will work in Handsfree Mode. (HFP - Profile)

The Samsung Galaxy S20 Ultra - will work with rSAP on Android 10 with a 5G and 4G SIM card from O2. (To identify which one you have the number on the SIM will show 4GPP or 5GPP respectively)

NB; a 5G SIM will not allow the vehicles cellular interface to connect to the 5G network unless the car contains a 5G hardware cellular interface, mine does not.

If you enable VoLTE, (4G) or WiFI Calling in your account, you may risk that the phone will not work on a 3G network once it has disconnected from an rSAP connection, until it has been restarted (or the SIM ejected and reinserted) causing an IMSI Handshake to take place between the network and the phone. I had a new SIM provisioned without this and this resolved the problem.

Incidentally and a side issue, the Qi Wireless Charger in my Audi, is also made by Harmon - a "Samsung" company, when I had a problem with it, I spoke to both Audi UK and Samsung, and Samsung's response was "We dont recommend you charge your phone with anything other than a Samsung Charger" cheers for that SMH.

For anyone thats interested or who doesn't know:

rSAP is remote SIM access profile in Bluetooth, it allows the car to "copy" the SIM into the vehicle and allows the cars electronics to make use of the SIM cards service, it allows WiFi to be used in the car and the data services in the vehicle to work with your own O2 contract as well as making calls, it also benefits from using the external antenna on the roof of the car.

HFP just allows you to make calls via the inbuilt electronics.

I hope this has been of use to someone.

Shunts...

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

gmarkj — Fri, 03 Jul 2020 09:58:29 GMT

Great follow up and thanks for explaining it fully.
The eSim part is not fully surprising - o2 seem to have issues with the iPhone version of eSim as well (with calls failing on occasion).
Wonder if the problem is because there is no sim to copy as such, and the software on one or both sides does not know what to do.
Rather amusing regarding the wireless charger. Left hand, meet right hand style faux pas!

Re: 5G SIM. eSIM and Bluetooth rSAP and the S20 Ultra

Shuntfield — Tue, 14 Jul 2020 10:37:41 GMT

@gmarkj yes, I think you're right with the eSIM, though I'm just happy that the Galaxy Dual SIM models are now implimenting the rSAP with success. Previous incarnations of Dual SIM handsets wouldn't do it.

I'd desire an eSIM but its just nice rather than required. As long as it works rSAP in the car, then I am happy, I don't mind paying the money to Audi's in car service from Datainside but I'd rather use my own data plan from O2 when I have 100Gb to burn.

I thought I would come back here and report it, its something specific that one person might google in the future.

Shunts...