Mobile data is generally a high-quality residential proxy. Turning your phone's airplane mode on and then off again tends to change the IP. If that doesn't work, try a factory reset.
It should be noted that the pool of available IPs is generally somewhat limited. There can also be some footprints between them, such as the IPs being located in roughly the same region/location. If you're running a fairly small number of bots/accounts, it should work fairly well. At a larger scale, you would ideally invest in private static residential proxies for each account.