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

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

When calling in CZ through O2 op call drops just before ringing with "server unreachable", other side have missed call.

 

It happens quickly, recently, it started few weeks back

Mobile data works fine.

Able to connect only to O2 op, could use any of the 3 ops we have few months back

Airplane mode on/off, esim on/off does not work.

Online help does not know what to do.

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

 

O2 op is probably making problems, will be orange flex ever usable in CZ? Does it have a solution?  

Thanks

 

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* I’ve clarified the thread title — Wiktor

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Rozwiązanie:

Poziom 32, Pasjonat Galaktyczny
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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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Poziom 28, Znawca Przestworzy
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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

@mdgarf  do you have active roaming packet?


Poziom 38, Pomocnik Międzygalaktyczny
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Orange Flex: EU roaming call drops on O2 Czechia ("server unreachable")

Flex should roam in EU without any problems. Something is not quite right here.


Poziom 12, Tropiciel Przestworzy
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EU roaming calling problem CZ, O2 "server unreachable"

It did, not any more.

Problem is, like this it is not usable and not worth keeping...


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

@mdgarf I suggest manually searching for an operator and, even if it's blocked, choosing one other than O2. Check the connection.


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

We have 3. One has "denied" in name other will not connect only O2 connects.

It is new behaviour, i suspect that local ops are making problems...

Olny esim delete and install helps for short time...


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


@mdgarfnapisał(-a)

We have 3. One has "denied" in name other will not connect only O2 connects.


Doc in PL lang where Orange PL can use roaming:

tolek_0-1759739101329.png

Source


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

@mdgarf I'd check with T-Mobile and Vodafone. Theoretically, you should be able to connect to any operator while roaming.


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

was able, not any more.

upfront refusal...only O2 is able to connect 


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


@tolek napisał(-a)

Doc in PL lang where Orange PL can use roaming:

tolek_0-1759739101329.png

Source



that is not true or updated, unfortunately... 


Screenshot_20251006-111103.png