How to dismantle a GSM FWT fixed wireless terminal?

Shenzhen EAST LINE is the professional OEM GSM FWT fixed wireless terminal manufacturer.
Model: ECG-950B, MOQ 100 pc to 3000 pcs.
www.oemtelephone.com/product/...

[@EHABABORAWASH]

Hi
I have a echo problem with this device (2 sim) if you can help me by any way it will be great...

[@cordedphone]

Hi dear, please contact your local sellers, as we don't know if they are buying the same device from our factory.