3CX making calls from Mexico

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Hi Guys

I have spun an 3CX instance PBX for Mexico on Amazon Aws. I can call out from It, but I cannot call in.
I have setup XX XXX XXX XXXX +52 644 121 1250 in my 3CX account details. 52 being Mexico 644 Tojuna and the local phone number.
Anyone can help me! Thank you