Do not download the latest version just because it's new. Version 5.0+ removed the "Band Selection" menu. If you need band locking, stick with a custom 3.5 or 4.0 build.

The ZLT S10G is a workhorse, but it is not for the casual plug-and-play user. It appeals to the tinkerer who doesn't mind scouring forums for the correct .bin file to unlock extra features or fix a carrier issue.

Not all firmware is equal. When downloading, you must know which "flavor" you want:

The community-driven "story" of updating this modem usually follows these steps: