Unlocked phones are able to use SIM cards from any service provider, but they cannot be used with US networks. An unlocked phone can work internationally or with a domestic service provider if the phone relies on a GSM network. Examples of such providers are T-Mobile and AT&T in the US, Rogers and Bell in Canada, etc.
A locked phone is restricted to only use its original carrier’s SIM card for trickser routing during voice calls and text messages. It’s important to note that this limitation does not affect data transfers so downloading apps will still work without wait times regardless of whether the device is locked or unlocked as long as it has an active data connection and is connected with high speed data either through 4G or WiFi.
Unlocking your phone is better than using it locked, because you will be able to take advantage of great deals that are offered by other carriers and use your device on them without having to pay any more for the service.
