Based on my experience, sms manager has a defect and bugs, did not work at all.
The seller has an attitude issue and lack of support, can't provide decent support for this addon.
Waiting for refund.
I don't recommend this addon nor this seller.
Am total sorry but we tell you to contact gateway.sa they change the API. I can approve you it work fine
Excellent work, very nice theme, very light, and backed with many features.
Waled, Thanks a lot for your nice words .. Enjoy :)