Web scraping at scale always comes down to one problem: getting blocked. Datacenter IPs get flagged instantly. Residential proxies trigger CAPTCHAs constantly. The solution that actually works in 2025 is 4G mobile proxies with API-controlled rotation . This tutorial shows you how to rotate IPs on demand using the https://iaproxy.com mobile proxy API. Why Mobile Proxies? 4G carrier IPs (Viettel, VNPT, FPT in Vietnam — or US mobile carriers) are classified as legitimate mobile traffic. Websites are far less likely to block them because that would mean blocking real smartphone users. Vietnam carrier IPs in particular carry very clean abuse histories — lower CAPTCHA rates, better bypass on Instagram, TikTok, Cloudflare-protected sites.…