LM-11
You're banned. Contact customer support to find out if it is temporary or permanent.
LM-17
You're banned. Contact customer support to find out if it is temporary or permanent.
LM-21
Update your payment information.
LM-60
Reactivate your content ID.
POL-0206
This error typically occurs while there are issues with the POL servers. No user action required.
POL-1160
This error typically occurs during updates due to server congestion. Either keep trying or wait a little while and try again.
POL-5313
This error is caused by your POL account being linked to an existing gamertag. You can either use your previous gamertag or contact SE to unlink it.
POL-5426
This error typically occurs around maintenance. Exact cause is unknown. Keep trying, and you'll eventually get in.
POL-12321
This is a Xbox 360 related error message. Recommended solution is reinstalling.
Freezes on “downloading data” while tethering
If you use PDAnet for tethering, you must use version 1.8 instead of 2.0.