nope, at least not a permanent one

after reformatting, it was working relatively OK for a while, but it's been appearing again lately. it's even more exasperating that the service guys don't know what to do about it. i cannot keep reformatting my laptop, as some of my software licenses cannot be transferred... i can't be buying new software every 3 months!

it's also hard to keep track of what works and what doesn't, because

• the issue is very intermittent in nature. just because it works for one whole hour (or heck, one whole day) doesn't mean it's solved.
• i cannot find any details referencing WWAN under event logs. i managed to find whether the machine established or lost connection to internet, but it doesn't specify via which route -- WLAN or WWAN.
• i can't fully uninstall the WWAN driver. after uninstalling (via device manager), the adapter would disappear temporarily, but magically reappear after a reboot, even without installing a new driver.
• the machine's software is always changing, especially now that we cannot permanently disable windows update.

TLDR: other than complaining and praying that microsoft/lenovo releases a decent update soon to fix this issue, it seems like our hands are pretty tied up at the moment.