I've got a Android Phone and I've noticed that when I check the status of my phone it shows my number as Unknown. I ask a friend to check on his HTC Desire that came from o2 and he has the same problem. Turns out this is due to the MSISDN setting not been set on the SIM by o2.
The networks will not set this for you as they will not understand.
Use +44.... format for your telephone number
Solution 1:
I had the same problem as described above with an Orange-branded Hero that I have unlocked and use on 3 but did find a solution. There is a SIM information application buried in the settings of Windows Mobile devices running 6.1 and above so I put my 3 SIM in an unlocked Kaiser and used this to alter the number recorded on the SIM. Once I put the SIM back in my Hero, the correct number was displayed in the phone status page under MSISDN.
The way to get at the SIM Manager application in Windows Mobile is as follows:
- Open Contacts
- Select Menu then SIM Manager
- Select Menu in SIM Manager and then Tools/List of Own Numbers
- The first page that pops up has an entry for My Number with the first number the SIM had when it shipped and with this selected, select Edit
- Alter the number to the one you want it to read under MSISDN in the Hero then Save and close out of everything Once you put the SIM you have altered back in your Hero, it should now show the number you chose in the phone status screen. Obviously the down-side of this is that you have to have access to a Windows Mobile device but there may be an Android application for altering SIM information that would do the same trick.
Solution 2:
- borrow a friend's iPhone
- place SIM into the iPhone
- and then set the MSISDN through settings -> phone -> Own Number.