I was fooling with Finnish search engine WWW.FI
and tried word "tamagotchi" in it.
I got tons of links to Finnish e-shops selling Tamagotchi Corner Shop game for Nintendo DS, but from the list of links I found;THIS
Looks like it is official Bandai software, don't know what characters there is thou.
Jamba, the cellphone downloads service that has this Tama cellphone game in it's web service is originally European (Deutch?) company, which has later wided their services all over the world.
I tried to find this Tamagotchi cellphone software from Australian, UK and USA Jamster pages, with no results.
I didn't know there was Tamagotchi game for cellphone released in 2000's Note: Push the "Katsele" button in that page to see animated GIF demo of this Tamagotchi software