I just sold IPhone and didn't know you were supposed to unlink phone from iCloud! Is my data safe?

I took out the SIM card and I did Settings --> General --> Reset --> Erase all Content and Settings. And I just now found out that my phone could still possibly be linked to iCloud OMG! I'm panicking! I found an article about this and I followed the steps and I didn't see my previous IPhone 5S device being linked to my iCloud account anymore. (See screenshot below) Is my data safe? Does this mean that my phone was unlinked when I did the reset? I don't know how to interpret this.

Added (1). This is the article I found https://www.itsworthmore.com/blog/entry/how-to-unlink-ios-7-lock-remotely I just sold IPhone and didn t know you were supposed to unlink phone from iCloud Is my data safe

Horizontal yellow flashy lines appear on iPhone 6 if I unplug it

I left my iPhone unlocked for about ten minutes without touching it. When I came back yellow flashy lines appeared on my screen. They only appear on the white parts of a page and do not go over images. When I went to notes it did not even have any yellow lines. I tried restarting and that did not help. I plugged my phone in to charge and I checked back ten or so minutes later and the lines were completely gone. I unplugged it and they appeared right away. I have dropped my phone in the past, I think probably 5 or 6 months ago last, I think it has been longer actually. My phone has cracks and has chips of glass coming from spots on the top of the phone, I put tape on the top corner of my phone to help with this. Does anyone have any ideas to why my phone may be acting up?

Added (1). I have only had this phone for a year and eight months

Cops can inventory phone without a warrant or consent depending if it has a removable battery or not?

I saw on live PD a cop ask the owner of a cell phone if it had a removable battery or not. The owner looked confused and I believe the owner said "no" and then the cop Said something like "ok, I'm taking it for inventory then". It was hard to hear the owners answer cus he was in the background and it's live TV, plus it was a quick scene and I can't rewind. I didn't see if he gave consent to search or probable cause. He was in cuffs but may of been detained not arressted and I'm sure the car was going to be towed since inventory was being taken. So if the phone battery is not removable is it considered something else like a MDT or MDC? If it is considered something like a MDC (or other computer device) then they won't need a warrant to search the contents if the officer believes it contains incriminating evidence pertaining to the arrest? I read that if a cop has probable cause to believe your computer has illegal or incriminating evidence that they don't need a warrant to search its data and you don't have to give them the password but they will take it to inventory and take you to court to get the password. So is there a difference on what a cop can or can't do with or without your permission with a cell phone(modern android/iPhone) that has a removable battery or not?

What's a good laptop for a software developer and where's the best place to buy?

I have a budget of around 1500 pounds, I'm studying computer science and my laptop is outdated and very slow.
I want to be able to develop mobile apps for android and iPhones and I want to be able to code and run programs in java, python and c, I also want to be able to use it for Web development.
I was thinking of a Microsoft surface Pro 5 with an i7 processor, what would you recommend and what shops online or offline do you find have the best value.

IPhone 6s not recieving certain text messages?

So my boyfriend is the only person I text who doesn't have an iPhone. He has a Samsung galaxy. (I'm unsure of which one) and when we're texting sometimes, we discovered that he'll send a text and I won't get it, so thinking he didn't answer I'll just leave it and it's extremely annoying. We figure out what happened and keep texting and about a day afterwards the text goes through, as if he just sent it. I'm not sure if it's my iPhone or his Samsung that's the problem but how can it be fixed?

WHY CAN't I TAKE A PICTURE OF THE SOLAR ECLIPSE?

So many people have told me that it would break/damage my phone lens if I do. Which makes no sense to me whatsoever because if you were to go out any other day and take a picture of sun, nothing would happen right? So why during the eclipse?

I also didn't get any glasses so I don't want risk viewing it but I was thinking to just record it from my phone and look through it.

( I have an iphone 7) and the camera lens seems pretty strong to me but I honestly don't know?

Can I still change the battery of a really old iPhone?

It's a really old iPhon. I think it's the iPhone 2 but I'm not completely sure. When I put it to charge, the apple logo will show up faintly and be like that for hours. Can I get a new battery? How much will it cost?