Good dating sim apps
In other countries, carriers may not be required to unlock devices or may require the consumer to pay a fee for unlocking.
Unlocking the phone, however, is almost universally legal.
Typically, a locked handset will display a message if a restricted SIM is used, requesting the unlock code.
On recent phone models running Android software, the phone will display a message saying “SIM network unlock PIN” or “Enter Network Lock Control Key” if network locked.
This is in contrast to a phone (retrospectively called SIM-free or unlocked) that does not impose any SIM restrictions.
Such discounts are worth up to several hundred US dollars.
If the phones were not locked, users might sign a contract with one company, get the discounted phone, then stop paying the monthly bill (thus breaking the contract) and start using the phone on another network or even sell the phone for a profit.
It is important to note, however, that the technology associated with the phone must be compatible with the technology being used by the network carrier.
A GSM cell phone will only work with a GSM carrier and will not work on a CDMA network provider.
Questions on Stack Overflow are expected to relate to programming within the scope defined by the community. Your SIM has an IMSI, but only the operator does map that to an actual phone number.