To know what is the country of origin , you can know its from the 7th ad 8th number of imei as below
The numbers 00 indicates that your galaxy smartphone is manufactured in the Original Factory
The numbers 13 indicates that your galaxy smartphone is manufactured in Azerbaijan
The numbers 07 indicates that your galaxy smartphone is manufactured in Germany
The numbers 20 indicates that your galaxy smartphone is manufactured in Germany
The numbers 70 indicates that your galaxy smartphone is manufactured in Finland
The numbers 91 indicates that your galaxy smartphone is manufactured in Finland
The numbers 41 indicates that your galaxy smartphone is manufactured in the UK
The numbers 44 indicates that your galaxy smartphone is manufactured in the UK
The numbers 18 indicates that your galaxy smartphone is manufactured in Singapore
The numbers 67 indicates that your galaxy smartphone is manufactured in the US
The numbers 71 indicates that your galaxy smartphone is manufactured in Malaysia
The numbers 81 indicates that your galaxy smartphone is manufactured in China
The numbers 09 indicates that your galaxy smartphone is manufactured in India
The numbers 11 indicates that your galaxy smartphone is manufactured in China or Vietnam
At the end updates doesn't depend on the country of origin it depends on the network operator in the country , they have a part to approve the updates , specially they have locked phones to their network
