Kernel+] Kali NetHunter for the OnePlus 3 & 3T | XDA Forums
OnePlus 3 and 3T: 10 Helpful Tips and Tricks | Digital Trends
Im so glad I replaced the battery on my 3+yr old Oneplus 6T. I could probably use it another 3yrs. Take it to a local shop if you dont diy : r/ oneplus
battery problem
Battery Calibration/Heating Tips: How To Improve Battery Life!!