How roaming of mobile can be identified

Question

Dear All,

is there any way to know SIM is in roaming.

Does any AT cmd or any Remote Access Service API provides any help over this.

Or any TAPI api on win32 helps me in getting this information????

Please help me in this regard.

with regards

Vinayaka Karjigi

Answer 1

The technical definition of "roaming" is that you're not on your home network, i.e. you're talknig to a VLR (Visiting Location Register) instead of a HLR (Home Location Register). Obviously the VLR will be operated by a different company.

[edit] On second thought, you'll see more changes. For instance, you'll also a foreign radio network. I.e. RILCELLTOWERINFO will contain a MCC/MNC that doesn't match your SIM.