Roaming

You need to set the APN to ‘mob.asm.net’

See here :

Changing the APN on an Android device to enable roaming 

Making a new APN may not work, if your device keeps pointing to the original but incorrect APN.

You may well need to look at your device’s manual, google the instructions, or contact your device’s manufacturer.

I just wonder, if you cannot change the APN in your device for some reason, whether it’s network locked to another network. 

As this is the Smarty community forum, populated by Smarty customers, we don’t work for Smarty, nor are we tech support staff. 

What is the device, a phone or a portable WiFi unit, who is the manufacturer, where did you buy it, etc ? This info may help to shed more light on your issue.