Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

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tolek

Poziom 32, Pasjonat Galaktyczny
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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

It looks like an IMS issue. Try temporarily disabling VoLTE in the settings and see if calls can be made. Of course, this isn't the final solution – call quality on 2G (if 3G is already disabled) will be worse than on LTE.

 

Is WiFi calling working properly?

 

Advanced steps: Download SIP IMS logs from Android for diagnostics. This might be helpful: https://nickvsnetworking.com/volte-ims-debugging-on-samsung-handsets-using-sysdump-samsung-ims-logge...  but you can also find other guides for your case.

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mdgarf

Poziom 12, Tropiciel Przestworzy
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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

Wifi calling works

5G is not working

LTE works

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ketrasaArtur

Poziom 43, Mistrz Międzygalaktyczny
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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

@mdgarf It's possible that Orange doesn't have a 5G roaming contract. So switch to LTE.

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tolek

Poziom 32, Pasjonat Galaktyczny
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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

When you start a call, do you see the network switch from 5G to LTE? Or if the service sometimes works as you mentioned, is voice using 5G (VoNR)?

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mdgarf

Poziom 12, Tropiciel Przestworzy
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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

did that, but it would be good to know when change is comming and support should know...

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mdgarf

Poziom 12, Tropiciel Przestworzy
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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

OK, I have overspoke. 

Even switching LTE, 5G 3G will not help.

Orange flex is not usable/working in CR.  

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tolek

Poziom 32, Pasjonat Galaktyczny
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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

październik

Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

@mdgarfnapisał(-a)

Only short term help is to delete esim and download new one. (not really a solution)

This is the strangest thing because then we know that it works - the happy path exists.

Can you try with a physical SIM card, not an eSIM?

 

@mdgarfnapisał(-a)

Online help does not know what to do.

@mdgarfnapisał(-a)

Even switching LTE, 5G 3G will not help.

Orange flex is not usable/working in CR.  

The first line of contact does the simplest things, such as restarting, replacing the e-SIM, resetting network settings, etc. Please let them know in the chat that you'd like to report the issue further, as you've already taken multiple actions (describe them) and the problem persists. In my opinion, this needs to be analyzed by someone at the next level of support. I've searched Google, but I've found similar threads that seem to revolve around the 2G/3G/4G switch, but we can't be 100% sure it's the same problem as yours.

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