There's a difference between finding a lot of WiFi devices and accessing someone's phone, especially doing so accidentially. Remember that unless you have the hotspot feature enabled your phone is purely a WiFi receiver, and won't be visible to another phone searching for WiFi devices.
Yes, there have been some silly things. I seem to recall that when the Samsung S3 was first released it had a feature to allow photos on it to be shared over any WiFi network it connected to, and turned on by default. This was reported to have caused some embarrassing incidents when people didn't realise they were sharing their personal photos with everyone in the office. But again, that's not the same as having your phone "read", it's a specific sharing feature that had been set up in a stupid way on a specific phone.
If you are getting someone else's phone calls and texts, the simplest explanation is that they gave the wrong number out. It's also possible that the network has re-used a number and you are getting calls from contacts of the former owner of that number, or maybe that there's a problem in the network somewhere (many years ago I had the problem where for several months if I tried to call one specific number I had a 50-50 chance of being connected to a different person, and always the same person. However the network technology has changed a lot since then). Or even that the other person sometimes diverts his phone but inputs the wrong number. There are many possibilities, but there's no mechanism by which 2 phones can accidentally connect and swap some information which makes one of them sometimes appear to be the other.
I've actually had the same phone number for 12 years so it's not accidental and it only happens on the Android. Just like my computer and DVR's all the networks show up on the phone. Some are wide open (I have UVerse, whom I really HATE) for my home wi-fi and it goes down so often that my network automatically scans to an open network and links to it. I never TOLD my phone, computer or DVR to do that, they just do.
I can't explain the calls and texts at all. It doesn't make a lot of sense to me unless someone's using a network type dialer, which I don't even know how to use but wish I did.
Funny thing about the pictures that you mentioned. I found out just how unsafe clouds can be one day when I went back through messenger texts from a friend of mine in Germany to retrieve a photo I'd deleted. I clicked it on so that I could copy it and when I did, his WHOLE CLOUD opened up! Included in that cloud were personal files and copies of orders he'd placed for products and photos I'm sure were not for my eyes.
That was DropBox.
I think the lesson to be learned is really just to be careful what one stores and types on a device and always make sure bluetooth and Hot Knot (called different things on different phones) are turned off and personal wi-fi passworded well. In open networks, like hotspots, I get all kinds of activity on my iOcean as it seems to have been programmed to seek open networks and connect to them. The new phone I got yesterday (
unbelievable performance right smack out of the box, BTW!... 13 hours of FB posting, video production and PicsArt before I even charged the battery! But it IS slower than the iOcean 3GB MKT 6752.) sought out networks and found literally dozens of them (three were open networks... not passworded at all) but I put in my carefully and tediously constructed password in and locked in down. Haven't cut the sim card for it yet though as I have to cut from micro to nano and wasn't sure if I would keep this phone as primary and haven't gone outside with it yet. HOPEFULLY I won't get the annoyance things with it though.
I'm glad I've learned to use "developer tools" as from there a lot can be tweaked to ensure greater stability.
On your last note of there being no way that two phones can connect and trade information, right out of the box the new phone told me to touch it to the screen of my old phone to transfer all the information from it. I tried and tried and could not do it! I don't know why... I had Hot Knot enable (called different things on each) on both phones yet it just wouldn't work.
It was ENORMOUSLY tedious just to get the apps that I use into the phone yesterday as it doesn't have an SD expansion slot and while it can read, somehow, the common programs I use, it didn't read the "Karen specific" ones.
I've NO CLUE how I'm going to get all my photographs and videos transferred into it except to pluck them all one by one out of a cloud and since I'm not going to sit around doing that I'm probably stuck going to the AT&T store to see if they can do it UNLESS someone can tell me how!
I don't like anyone touching my phones. I especially don't like going to stores that have never seen the likes of a Chinese phone before and look at it like it landed from another galaxy.
I hope someone can give me a clue how to get all those photos to hop from my iOcean over to the new phone before the iOcean's battery completely drops dead (the USB port is loose in it and the battery underpowered for such a highly featured phone to start with so I'm running on limited time).
Have a great day! :-D