[holden]

Hello,

We would like to clear some facts and questions about unlocking Siemens/Cinterion modems.

MDM Service Tools unlock first simlock level doing it in modem mode.
It means to get proper connection modem must be switched on in normal mode, pc must see it as normal modem device.
Transmission is possible only in this way.

There is many various device configurations, many times you can see RS232 port on it but it's not directly connected with modem module.
Even if you connect it with proper serial cable, you can't establish connection with pc and MDM, you can't do Read Info/Unlock.
The problem is due of fact RS232 port isn't connected with modem itself but it's for device only and used for configuration / programming / connection whole device only.

Sometimes after successful unlock you can't get network on modem device, it's not because of bad unlock, several
problems could be a reason:

- sim card is blocked
- serial number of modem is linked to sim card and will work only with it
- modem is barred for all outgoing calls
- modem is barred for all outgoing calls and it's used in roaming
- modem is locked on Network Subset level
- modem is locked on Service Provider level
- modem is locked on Corporate level

Below you can see few photos of devices which has got RS232 and Siemens modems inside but due of missing connection from RS232 to modem module you can't make connection with MDM Service Tools.



Solution for such problems is using such device which will allow to put modem module and get connected with pc + MDM.

Here's example - device with build in ES75/MC75 which has got RS232 and after unlock works on all networks without any problems.



Best regards,

Martech Team