topic Samsung Galaxy S10 - Bluetooth rSAP and 3G Network in Android

Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

Shuntfield — Fri, 17 Jan 2020 14:49:24 GMT

Hello Everyone,

I seem to be having a strange problem with my phone, and I wondered if anyone is in the same situation or is able to replicate it.

I have an Audi S3 that has a built in Hands Free Kit, it allows connection via Bluetooth Handsfree Profile, and also Bluetooth Remote SIM Access Profile rSAP. The latter is the better connection of the two because it essentially "copies" the SIM into the car and the cars built in equipment can use the SIM to access data and make calls. Making all the whistles and bells work via the MMI and the antenna on the roof.

The stock SGS Android P software didn't have this function when I upgraded to Android Q the function appeared.

This all works fine, until I exit the car. Especially if I am in 4G coverage, the phone will connect back to the 4G network and all is fine.

If I try to make a call (I do not have 4G calling or WiFi calling enabled - thats another story) then the network/phone should normally drop back to 3G and make the call.

In my case it does not. It sits on 4G trying to make a call, then times out and abandons the call, if some one calls me then they go direct to the voicemail.

If I force the phone to 3G then I lose the HSDPA packet connection altogether.

If I force the phone to 2G then I can make calls and EDGE connection is fine.

If I switch back to 4G then data is fine but I cannot make a call.

To resolve:

Eject the SIM and reinsert it or;
Restart the phone

I wondered if anyone can replicate the problem. The phone was a little glitchy anyway, and I haven't done a factory reset for a while, and I did that and the problem existed before, and now after doing that.

Any help appreciated.

Thanks

Shunts...

Re: Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

MI5 — Fri, 17 Jan 2020 15:02:47 GMT

I've not had the problem for a few years and it was back when you needed an app for rSAP.
The problem was fixed with a software update to the car.
Infotainment systems need constant updating as technology changes rapidly so check with your dealer to see what updates are available.

Re: Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

Shuntfield — Fri, 17 Jan 2020 15:27:48 GMT

Thanks @MI5

There are no updates for the car.

Re: Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

BOSSGOGG — Sat, 18 Jan 2020 10:36:23 GMT

Have you done a factory reset since upgrading to 10?

Can you try using it in safe mode and see the results ?
My note 10 WiFi calling and volte stopped working after updating to Q, a factory reset solved it after proving the point with safe mode.

Re: Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

Shuntfield — Sat, 18 Jan 2020 11:37:40 GMT

@BOSSGOGG in my original post, I said that I have Factory Reset it, and that hasnt't cured it.

Re: Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

BOSSGOGG — Sat, 18 Jan 2020 11:41:27 GMT

Apologies, didn't see that.

Try running it in safe mode to rule out app crazyness.

Re: Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

Shuntfield — Wed, 12 Feb 2020 18:15:59 GMT

For anyone who is interested I posted the problem in the Samsung Members App.

They came back with me having to take the phone to a Samsung Store to have a logging mode enabled on it then to go back an conduct the anomoly and report back with the test files.

As the nearest Samsung Service centre is a bit of a trek away from me I will deal with it later. I might end up not doing it at all, I have a S20 Ultra Pre-Ordered so then it may go away... all of its own accord!

Shunts...

Re: Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

Shuntfield — Sat, 29 Feb 2020 15:08:48 GMT

Thought a stab at a new SIM card would do it.

... and it has, there must have been a problem with the old card. Anyhow its working fine now.

Shunts...

Re: Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

BOSSGOGG — Sat, 29 Feb 2020 15:12:57 GMT

Great. Thanks for sharing the solution.

Strange one for sure.

Re: Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

jonsie — Sat, 29 Feb 2020 16:07:54 GMT

Good to know it's sorted @Shuntfield

Re: Samsung Galaxy S10 - Bluetooth rSAP and 3G Network

Shuntfield — Wed, 15 Apr 2020 14:05:07 GMT

This is actually back again.
I have a new phone and a new car, and it's back.
Changing the SIM resolves it in the short term, but there must be some mis-provisioning on my account or SIM card.

The only way to really resolve it is to invoke an IMSI/TMSI handshake again either by ejecting the SIM or restarting the phone.

Not sure how I could get this over to the right person at O2.

Shunts...