Having same issue. My boyfriend and I both have an SG Stylo 2's on Boost service. Have completely separate Google accounts and have never signed onto each others phones for any reason. Yet his Google searches are showing up in my history, but only when he's on the road in his truck. It's not really am issue, just really curious because my searches don't show up in his history. And again, it's only when he's on the road, anywhere from the next county to the next state over. I didnt notice this happening until he had to use my hot spot last month until payday to add money to his account. But other than that, nothing on the phones have ever been connected, including chrome or gmail wise.
---------- Post added at 06:48 AM ---------- Previous post was at 06:33 AM ----------
Wow.. What a terrible thing to make this concern out to be! My children's Ipad is doing this search history exchange with my LG android and it IS a problem because NOBODY gave consent for this sync. Its soooo not ok, and to assume that breaching privacy is because you are hiding something is ridiculous!
I'm glad I'm not the only one that saw this as concerning, lol. Stop hiding stuff from your SO (minus cute surprises, y'all keep that **** up

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I'm curious as to what's going on because it can be a sign of privacy intrusion. Obviously no permissions were given here, especially when 2 completely separate phones and accounts are linking themselves for unclear reasons. Neither me or my boyfriend see it as an issue. It's just intriguing to us.