No phone is entirely untraceable since you’re dealing with a phone service provider who can track some information about your traffic. However, you can use a privacy-focused phone like PRIVY 2.0, Purism Librem 5, or Bittium Tough Mobile 2C. Besides, it’s a good idea to enhance your data protection with a reliable VPN like VeePN. It spoofs your IP address and hides your digital footprint, making it much harder for third parties to monitor your activities and track your location.