Admin console -> display phone number zebra tc75 ?
As answered in multiple similar posts in the past, your problem is likely related to the SIM cards themselves. Your telco operator likely has not included SIM card number in the storage area for any standard device firmware to read out the phone number. Our customers in Hong Kong had had similar problems in the past, and they just asked the Telco to replace the SIM cards to get the phone numbers displayed properly in the web-console for the same phones.
If you can't get replacement SIM card, you have to use custom attribute (for web-console user to see the number, assuming the device end-user will not use other SIM card on the device), or custom data together with some customized app to get the phone number to be written to a predefined XML/INI file for collection & readout from the web-console.
thanks for your reply that s exactly what I want ..