How to get telephone and mobile phone for one partner

Question

Hello Expert,
In VA03, I open one sales order and go into the partner tab. Then I selection one partner and click "Detail" button, one page with partner detailed information will pop up.
In the pop-up window:
There are two fields: Telephone and Mobile Phone.
In my program, I want to get these two information. 
I tried to call FM 'ADDR_COMM_GET' by passing address_number(VBPA-ADRNR), table_type('ADTEL'), iv_current_state(SPACE). For some partner, it works, but for others it doesn't work.
Then I find table ADR2 which is used to keep phone infomration. There are two entries in the table. But how can I identity which one is telephone and which one is Mobile phone?
So can any expert help me on how to get the telephone and Mobile Phone of the pop-up page?
Thanks in advance,
Best Regards, Johnny.

Answer 1

Read ADR2-TEL_NUMBER where ADDRNUMBER = VBPA-ADRNR and R3_USER = '2' or '3'.
These are the possible values
        Telephone is Landline Telephone
1     Telephone is Default Under Landline Telephones
2     Telephone is Mobile Telephone but Not Default Mobile Phone
3     Telephone is Default Mobile Telephone
X     Obsolete - No Longer Valid