Terminology
| Abbreviation | Explanation |
|---|---|
| HLR | Home Location Register |
| HTTP | Hypertext Transfer Protocol |
| IMSI | International Mobile Subscriber Identity |
| MSISDN | Mobile Subscriber Integrated Services Digital Network Number |
| SRI for SM | Send Routing Info For Short Message |
| SS7 | Signalling System Number 7 |
| SNPAC | Swedish Number Portability Administrative Center |
| RFC | Request for Comments, a publication from the Internet Engineering Task Force |
| MCC | Mobile Country Code |
| MNC | Mobile Network Code |
| MVNO | Mobile Virtual Network Operator (do not have their own radio access network) |