To increase internet speed on a mobile phone, some effective methods include restarting the phone to refresh its software, checking for and installing software updates, disabling background apps that consume data, and using a VPN that can sometimes improve speed. Adjusting network settings, such as changing DNS settings to faster ones like Google DNS (8.8.8.8 and 8.8.4.4), and enabling specific developer options like "Wi-Fi scan throttling" and "mobile data always active" on Android phones can also help speed up mobile internet. Additionally, selecting the correct authentication type (POP or CHAP) in access point names (APN) and optimizing network bearer settings (choosing LTE and newer networks only) can improve mobile internet performance. Avoiding areas with weak signals and trying different networks or public Wi-Fi hotspots can also make a difference. Some users may find that using a mobile data signal booster is a practical solution for consistently weak signals. Checking for apps that boost internet speed and enabling text mode in browsers to reduce data load may also help improve speed.