Explanations, descriptions, tables, references

• 12. About SIM cards

• 13. FAQ about GSM

• 15. Links, GSM related

• 16. List of country codes world wide

• 17. List of number series

• 18. List of GSM operators Worldwide

• 19. Links to GSM operators World wide

• 20. List of GSM Customer Care numbers

• 22. GSM codes

• 23. Free numbers in different countries, from cell phones

• 24. What is IMEI?

• 25. Motorola's undocumented menu shortcuts

• 26. Motorola bible

• 27. SIM lock, what's that?

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