when roaming with a chinese sim card, all my traffic keeps going through china, regardless how long i leave the country. so for practical purposes, it is like i never left the country.
but if i use an EU sim, suddenly after 30 days i am no longer considered to be part of the EU? as an EU citizen? how does that make any sense?
EU laws should apply as long as i use a EU sim card, regardless how long i am outside of the country. only when i switch sims, then i find it acceptable to say that EU law should no longer apply to my phone.