Daniel2424 replied to the thread Prepaid SIM cannot connect to any network abroad (roaming enabled, multiple countries tested).
Hi,
Thanks for the reply.
To clarify the situation: I’m not fully sure whether the SIM was successfully activated in Germany. A friend brought it to Vietnam for me and mentioned that the KYC (Video-Ident) was completed.
However, the current behavior is:
the SIM can detect available networks (e.g. Viettel, Mobifone)
but it cannot connect to any network at all (no service / registration fails)
Based on this, I believe the issue might not be related to datapasses (since even basic network…
Daniel2424 posted the thread Prepaid SIM cannot connect to any network abroad (roaming enabled, multiple countries tested).
Hello,
I’m currently experiencing an issue with congstar prepaid SIM cards when roaming abroad.
Situation:
The SIMs are used outside Germany (tested in Vietnam and China)
Devices: iPhone and Android (multiple devices tested)
Observed behavior:
Roaming is enabled on the device
Available networks (e.g. Viettel, Mobifone, etc.) are visible
However, the SIM cannot connect to any network (“No Service” / registration fails)
Manual network selection also does not work
Same issue occurs across…