Issue / Question
TC75 rev A KitKat v01104 comes with Nano SimSocket enabled as default, but if customer want to use Mini Simcard, the UI needs to be enabled with special WWAN_UI.CONF file.
TC75 Preferred Network Selection is not described in TC75 Integrator Guide.
Sim socket selection and Network & Band Preference Band Preference UI is disabled
Resolution / Answer
- Download the WWAN Configuration. (Download>>)
- Copy the WWAN_UI.conf file to the root on the microSD card or Internal Storage.
- To set the default SIM slot, touch > > More > Cellular networks > SIM socket selection.
WWAN_UI.CONF contains this text
# SIM socket selection UI (0: disable; 1: enable)
SIM socket selection UI (Default SIM slot)
# Technology preferences selection (0: disable; 1: enable)
# Band preferences selection (0: disable; 1: enable)
The TC75 contains three SIM slots that can be used for installing up to three SIM cards. After installing the SIM cards, the user can select the default SIM card that the device uses.
To set the default SIM slot, touch Settings > More ... > Mobile networks > SIM socket selection
Technology preferences selection (Preferred Network Selection)
Once configured, the user can select the network mode.
To set the preferred network, Touch Settings > More ... > Mobile networks > Preferred network type
Band preferences selection
Band Preferences Once configured, the user can specify which GSM bands are used in your network.
Touch Settings > More ... > Mobile networks > Band preferences. Touch one or more band names. A checkmark appears next to the selected bands. Touch Save.