Get yourself an esim router and change anonymous esim regularly. Only ever connect your phone via wifi. Use built in VPN/Tor in the router.

@silentlink 

 Now imagine if everybody would do this. Additionally devices could connect as a mobile meshnet. 
 

 What about stealing someone else's wifi like a mile away? 

 this is useless unless you can also switch the IMEI 

 You can change the IMEI in some devices. 

 GL 750 and Nokia bananaphone

Do you know of any others?