[Samsung Galaxy S7 Questions and Answers] Meshuggahblast:
My thoughts (which are only MY thoughts, I'm not pretending to have the absolute truth):

- Blu Vivo X has a mediatek CPU which isn't at the same level as Exynos or Snapdragon CPU, still it will do the job.

- Blu is know for adware but is also known for having malwares installed

- 4010mAh battery, I would be very careful with that number. A high quality manufacturer will announce the capacity of their battery and you can almost be sure that it is true. Now, when you go to less known, less top quality manufacturers, when they say 3000mAh, you test the battery and it's in fact like a 2000mAh. So before making a choice, find concrete tests which tells you how much time you have with a full charge. Don't listen to people on Youtube with no test protocol who say "Yeah, I can last 2 days with it" because you can't know their perception of things, you can't know if they have been paid, you can't know what they do with their phone. If I turn off Wifi, LTE, and keep the screen of on my OnePlus One, I can last 1 week! Now if I use it normally, I last 1 day, 2 days at the most, but real screen on time is like 6 hours. So be careful and don't trust fanboys or people who just throw numbers like this.

About battery capacity, I give you an example I have read some years ago when Xioami released their external battery pack (10.000mAh). When tested, it was almost good but more around 9000mAh. They had compared to unknown brands found on Amazon, and some batteries announced like 10.000mAh, had in fact less than 5000mAh in capacity. So be careful, Blu isn't such a great highly recommended trusty manufacturer, so I would tend to think their numbers are enhanced for the commercial speech, but in real like, will a 4000mAh battery last a lot longer than a 3000mAh from Samsung, I doubt it.

So in the end, what do you think you will do with the Vivo X than you can't do with the Galaxy S7? That's the real question. You want more storage space? The Exynos version of the S7 has a SD card slot. More battery, better buy an external battery pack, it will cost you less.

That's my point of view, I would never trade a flagship from a very well known brand some model from a brand known for cheap phones and who put Mediatek processors in their phones. I highly doubt that the Blu Vivo X will have internal memory that has the same speed as a Galaxy S7, I highly doubt the pictures from the Vivo X would beat the S7, I also highly doubt you will have more "Screen on time" with a Vivo X as Samsung has spent time to optimize their system (you can also debloat it to gain battery life by removing all Samsung crapware). That's only my point of view, but I don't think it's a good idea. You should make your own idea by reading LOT (not just 1 or 2) reviews on the Blu Vivo X, watching videos on Youtube and read between lines, don't trust people that aren't even tech journalists ; )

EDIT: Here are some interesting reviews I've found on Amazon of people not only putting 5 stars and saying "great phone!":

Review 1: "This phone does exactly what the description says. It takes Ok pictures, is thin and comfortable in the hand, and is relatively easy to use. However, the processor speed and user interface, are not up to par with a Snapdragon or Galaxy S. I thought it would be a good idea to upgrade my Galaxy S7 to the VIVO X. I was not impressed. The system response was slower than what I'm used to and the UI just feels "cheap" to me. On a brighter note, the front camera was awesome for using Google Duo to talk to my son while I'm on the road. Its not a bad phone, I just feel like my S7 is a better phone."

Review 2: "I'm pretty conflicted with this phone. I want to adore it, however there are some pretty major setbacks that I'm not sure if I can look past. With that being said, I'd still recommend this for the price.

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Pros:

- The screen is big but you don't get a big phone. I've strayed away from 6" because I'm a little person, but I quite like holding this because it's skinny enough that small hands can hold it and also enjoy a "big boy" screen.

- It's smooth. It's definitely faster and more smooth than my last phone (HTC Desire Eye). Installing apps is lightning fast, scrolling through google is a breeze, and having multiple apps in the background doesn't slow it down.

- Sound quality is quite good. It's bass-y, which I like. It picks up the slightest noise though, which could be great or bad depending on the situation I guess. It goes quite loud as well.

- Plenty of storage. You'll be able to fit thousands of photos, songs, and quite a lot of apps onto this phone.

- Fingerprint scanner is awesome. I've never had a phone that did this, so it's kind of fun. :)

- Messaging notification drop-down is AMAZING. I LOVE this feature. I was pleasantly surprised when someone texted me and I was able to read/reply from the drop-down, all while staying on whatever page.

- You can do split-screen. I think it depends on the app though. In theory, it's great that you can have two pages up at a time.

- Android nougat is so nice. I had Android 5.0 with my last phone. Upgrading to 7 is definitely what I needed, and hoping for an update to Android 8 in the next year, maybe?

- The actual feel of the phone is high-end. It feels like a top-rated phone, but without the pricetag.

- All of Google's apps come already installed. I personally don't use many of Google's features, so luckily it's easy to remove them and add some extra storage to the phone.

- It came with a screen protector already on, an extra screen protector in the box, and a case as well! It also came with the standard charging accessories and some earbuds.

- Fast startup/reboot. The initial startup is a bit slow and worrisome, but it's just the one time as it gets itself ready for you! After that, turning it on is quick.

Cons:

- The camera. So many problems with it. I'll go into detail at the end of this post. This is the biggest obstacle holding me back from possibly sticking with this. My last phone had a superb camera that was clear, could focus on micro surroundings, adjusted perfectly to light... And this camera fails in all those areas.

- The resolution IS as advertised. No you won't be getting the clearest of words on your screen, but it's passable. It's noticeable if you switch from a better resolution phone like I did though.

- The lack of cases is strange, I must admit. Hopefully some more come out soon.

- No theme, at least not that I could tell. I think all of my past Androids of recent years have had an option for different interface themes. This doesn't seem to have this feature.

- I couldn't access ANY ringtones/notification alerts. I had to download a ringtone app.

- 14GB of my 64GB was already taken up. I can't figure out what's taking up so much space. I've gotten rid of any bloatware (luckily wasn't a lot, so great job, BLU), but 14 is still a lot.

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I'd love to give it 5 stars, but there's just one thing that's so jarring to me, and I don't understand it at all... When you use your camera (back and front), the window on your screen is crisp and beautiful (back is, front is lackluster). But when you go to look at the image, it's blurry. It's like it goes from the supposed 13MP+, down to maybe an 8MP (at best) once the picture is actually taken. I'm pretty miffed at this. I mean, really, the camera specs are a lie.

To go along with the camera, it also has a hard time focusing on things close to it. For example, selfies are a joke. You get that perma-airbrushed look even without the beauty filter on. I have freckles, but you can't see them in the photos. Some different camera apps make the clarity and focusing a bit better, but you'd more than likely have to deal with obnoxious ads unless you want to pay for a different camera app.

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Overall, I'm not exactly happy with it, but I'm not mad either. I really wish the camera was better. I switched from a 2014 phone which excelled in that area, so it's sort of hard to downgrade after spending a couple hundred bucks. I did upgrade in many areas which is nice though. I sort of want to return the item, but I might keep it. Luckily I'm not a huge selfie taker, so I may not care too much about the problem a week from now."

So all in all, I've also read some reviews from tech websites, the Vivo X seems to be a good phone FOR THE PRICE. So if I were you, I wouldn't expect a 250$ phone to have the same quality of components of a 700$ phone. Mediatek processor, Only Gorilla glass 3, LCD screen not Amoled, Camera with only "ok quality". If you extrapolate, that can give you an hint of the quality of the internal memory, of the quality of the RAM used, the quality of the GPS chip (will it fix your position as fast as a S7? Don't know, but I doubt it).

To me, your question is similar as saying "I have a Ford Mustang, is it worth switching to a "add name of any common cheap car" ?" You see what I mean?