Use the credentials admin/admin or root/root if you haven't changed them. How to Flash Unlock Firmware
The ZLT P28 is a popular 4G/5G CPE router used in many regions, often provided by mobile network operators as part of a data plan. Like many carrier-supplied devices, the P28 may have firmware restrictions limiting features such as band selection, APN editing, TTL (Time to Live) modification, or SIM lock to a specific carrier. This paper explores the process, risks, and resources related to unlocking the ZLT P28 via custom or modified firmware. zlt p28 router unlock firmware download
Features one 10/100Base-TX LAN port and an optional RJ11 phone line port. Use the credentials admin/admin or root/root if you
This locked firmware restricts your freedom. It might: TTL (Time to Live) modification