Is running background service possible in WP8?

[joaocardoso]

I don't think it will pass the certification since you don't have a viewfinder as a firstscreen, as stated in the requierement 6.13 (see link/text below)

Yeap you are right. But you can display the viewfinder and still do other tasks. But that's starting to get a bit farfetched for my taste.

I would still prefer the voice command. Unlock screen with a swipe (someone that may be using this would have to consider not adding a password to lockscreen), long press home screen, talk.

[im2amit]

Hi.
Maybe you could use a nfc tag to launch your applciation? And use a background agent to check position every X minutes?

Nfc is readed when lockscreen is displayed, too.

I like this idea - of using NFC tag to launch my app?
Is it true that it will work - "Nfc is readed when lockscreen is displayed, too."