Wifi hotspot trick

Here is my problem: I have a proxy server addressed like at 123.1.1and port like 808. If I connect directly to this proxy from a device( like my laptop or smartphone) with the configuration for that proxy, the ip address changes fine. But if I tried to create a wifi hotspot from my laptop, the new created hotspot can't "preserve" the configured proxy for my smartphone. I need a guide or solution to have the new wifi hotspot "already" configured the proxy, so that when I connect my phone to that hotspot I don't need to do anything but the ip is still like "changed" Budget around $50, thank you.