Its got an GPS but as my Iphone that dos use the same SIM Card is used for Filming, i think i dont know if it works whitouth it.. ^^, also the Pyra is using a normal size Simcard and my Iphone an Nano Sim..
I dont know if this whole GPS and 4G Option allready got suport by Software..
Prepaid SIM cards exist, and I think it's almost impossible to get a prepaid SIM card that doesn't include data.
And are cheapish/last at least 60+ days according to this totally reputable fandom wiki link https://prepaid-data-sim-card.fandom.com/wiki/Germany#Deutsche_Telekom_(formerly_T-Mobile)
Just filming yourself trying out a activated prepaid SIM card in your Pyra and finding out live would be a fantastic video.