Follow this guide to add a profile. http://www.tp-link.com/en/article/?faqid=423

I know how to add apns etc. Just want to know what 'Invalid Status' means in manual network selection. My sim works ok(ish) with the O2 supplied dongle (Alcatel x230d) but I want to use the MA260 with MR3020 for better reception potential.
Please don't quote or link obvious manual solution ideas.

Thanks anyway for the reply.

Maybe it is a compatiblity issue.
Do you know the band supported by your ISP?
For MA260, it is noted on TP-LINK website.
GSM Band 850/900/1800/1900 MHz
HSPA+ Band 2100 MHz