Can only see mms I send to myself. The others i have to go to website and see. Have checked with Tele2. Any ideas?

Maybe look at this page Send messages with your iPhone, iPad, or iPod touch - Apple Support

If Tele2 has it's settings correct (Did they confirm your APN settings etc? and the MMSC settings? Maybe the Max MMS data size is not set correctly.)

Settings -> Cellular -> Cellular Data Network

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Settings -> Messages -> Send as SMS

Settings -> Messages -> MMS Messaging