[gabi_n]

I have a metro pcs wp Nokia lumia 521 with a T-Mobile sim on straight talk byop. I can't get the apn/MMS working. Please help. I've tried different settings with no luck.

[xandros9]

I had to set up my sister's 521, and later 925 with T-Mo-based Straight Talk and the APN settings were a pain, it took a solid 10-20 minutes of trial and error, switching around settings and stuff.

The settings had to be different on the 925 too, so I wasn't too happy with that.

Might want to poke through here, try these various settings, see what works for you.

[gabi_n]

Do you know which website you used for the 521 to work? I have been tryin for about a week now.

[xandros9]

Oddly enough I must've forgotten to attach the link to the folder where I stash everything relevant: http://1drv.ms/1KtyBA8