I was looking into Sprint Cellular internet. I've had them before, between 2008-2014, and trust me, it beat the only 2 other choices for gaming I had access to: dial up, and satellite internet. The only problem is my Dreampi is a Wired DfreamPi. So there's DMZ issues.
These things are advertised as wireless bridges: https://www.ebay.com/itm/VAP11G-Wireless-Bridge-Cable-Convert-RJ45-Ethernet-Port-to-WiFi-Dongle-AP-Vonets/351903580172?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20180816085401%26meid%3Dd5654aaa723a449183af8e5d2b7f5886%26pid%3D100970%26rk%3D1%26rkt%3D3%26mehot%3Dpp%26sd%3D351903580172%26itm%3D351903580172&_trksid=p2481888.c100970.m5481&_trkparms=pageci%3A6033eb20-176d-11e9-a54d-74dbd180c791%7Cparentrq%3A48c9d8f11680ab4cafae2b73fff47540%7Ciid%3A1
I understand it's not the best router because it doesn't have ac, but when your weakest link is your network raw speed, at 1.5 Mb/s inbound, 400k outbound, you don't need to be the fastest wifi signal to survive. You need a faster internet
Some people has a misconception about cellular internet. Most people think it's satellite. Those are 2 totally different beasts. Cellular run along the ground from 100m-1km above the surface of the earth. Satellite travels 30,000 km into space and then back down to earth for our outbound message, and your inbound message has the same built in ping, even if sent to a next door neighbor. I don't care if satellite internet is 1 Tb/s that delay makes satellite not good for gaming at any speed. Cell phone is redeemable by adding less than a millisecond of delay. (in the days where 3G was prime it could add 10 ms of delay, simply because not every tower was connected to the internet, so it added a slightly longer first and last leg. I live near Cleveland and the main tower pinged from Kansas City back in 2008. 4G and LTE corrected that error and has internet linkups on every tower.)
Some people say cellular won't work with Dreamcast. It's faster than Dial Up, and if I get 4G LTE, my ping times are less than 1 ms beyond a traditional hard-wired network. If there is some other reason why Cellular won't work, like maybe you can't DMZ these bridges from a wifi device that runs off cellular, I'd like to hear it. But if the only reason is ping, rest assured that it will not effect it. Even Xbox and Nintendo say the only reason wired connections are more preferred are because they are more stable. If you can't consistently meet the minimums of 3 Mb/s in 1 Mb/s out with land-based internet, both say pick the faster cellular easily.
I've had very minor outages with Satellite TV, it was so slight that it wouldn't paying more for hard wire for just TV. i assume cellular outages are around the same order of outage frequency as Satellite outages. If that's the case, cellular outages are like 1 out of 1000 online seconds or less.
If Sprint's deal is to be believed, I'll pony up $20 and pay for the difference and get 4G LTE internet. I just want to make sure I'm not shooting myself in the foot when it comes to Dreamcast. Modern Game benefits outshine the retro benefit of DC, but it's a bonus I want to be informed about before I make a decision.