Flashing a PAC file is not as simple as installing an app from the Play Store. It carries risks:
Only use PAC links from trusted sources. A malicious PAC file can redirect all your traffic (including banking and email) through an attacker's server, allowing them to intercept or modify data. Never enter a random PAC link found on a forum. nokia ta1352 pac file link
Cause: The phone requires a very specific syntax.
Fix: Ensure no trailing spaces. Use http:// (not https://) if your server lacks a valid SSL certificate. Also, confirm the file name is exactly proxy.pac (case-sensitive on some servers). Flashing a PAC file is not as simple
This is the most important section of this guide. While it is tempting to click the first "Download Link" you see on a forum or video site, doing so carries significant risks: The Nokia TA-1352 is a variant of the Nokia C20
The Nokia TA-1352 is a variant of the Nokia C20. It runs on a Unisoc SC9863A chipset, which typically requires a PAC file for flashing firmware. Flash File (Stock ROM) Details
Firmware for this device is used to fix issues like being stuck on the boot logo ("hang on logo"), software bugs, or forgotten screen locks. Nokia C20 - Full phone specifications - GSMArena.com