If you still see "SimSync could not retrieve account" after trying all the above, consider switching to more reliable tools:
Please provide:
sudo apt update && sudo apt install simsync # Linux example simsync could not retrieve account
When running simsync , the process fails with the error: simsync could not retrieve account
On Linux, you may need dialout group membership or udev rules for SIM access. If you still see "SimSync could not retrieve
Once you resolve the error, follow these best practices to avoid recurrence:
If the SIM belongs to a carrier that uses MILENAGE or TUAK algorithms (common in 4G/5G), SimSync simply cannot retrieve the account because the authentication key never leaves the SIM’s secure element. In that case, no software fix will work — you must contact the network operator for provisioning credentials. Follow these solutions in order
Follow these solutions in order. The first fix is often the simplest.