If your ‘Blu Studio Mini LTE 2’ device is failing to connect to a local network, this would usually indicate that the phone is being used in a location with limited network coverage / poor signal strength.
To test this, please try performing a network search to select a network manually –
Apps > “Settings” > “More” > “Cellular Networks” > “Network operators”
Your device will then search for local networks and you can select one from the list shown (if network coverage is available in your location).
Note: If the “Network operators” option is not shown in “Cellular networks”, switch the phone off/on and try again.
If this resolves the issue however, please ensure that the network search mode is changed back to “Automatic” when you move to a new location –
Apps > “Settings” > “More” > “Cellular Networks” > “Network Operators” > “Automatic”