No. SIM lock is stored on a separate partition (PM - Permanent Memory). You need a network unlock code for that. Flashing does not change IMEI or lock status.
The term "latest" is relative. Nokia stopped supporting Symbian S60v3 in 2012. However, the "latest" flash file refers to the final firmware version released for the RM-346 before support ended. For the E71, the final stable versions are generally around v500 or v510 (depending on the product code).
Updating to the latest flash file provides: nokia e71 rm346 latest flash file
Technicians in Latin America still service these phones. Search for "Nokia E71 RM-346 firmware" in Spanish: "Archivo de flash para E71 RM-346."
File Naming Convention:
A legitimate file should look like this:
RM346_510.21.009_prd.core.fpsx
RM346_510.21.009_prd.rofs2.fpsx
rm346_510.21.009.uda.fpsx You cannot simply copy these files to the phone
Yes – Phoenix automatically handles incremental flashing. It will overwrite everything.
If the phone displays in a language you don't understand: nokia e71 rm346 latest flash file
You cannot simply copy these files to the phone. You need specialized hardware and software tools.
This is the hardest part. Nokia’s official servers (NaviFirm) were shut down years ago. Do not download "flash file installers" from random pop-up ads. Stick to trusted archival sources.