Huawei or Samsung or Apple

Very briefly Huawei p20 or Samsung a40 or iPhone 6s

i phone 6s: cheap, versatile, vlt will soon be supported by apple, battery will run out quickly

huawei: all well except the emojis on snapchat etc. And if it falls, it tears quickly, the most expensive of all

Samsung: very good, emojis at snap not as good as i phone and as bad as huawei. I like the construction. Average price

In my experience the most durable cell phone.

What is important to you for the cell phone? Which programs / apps should be running? What should it be able to do well compared to the other models?

In the end, of course, it depends on what you value. Each of these models has different advantages and disadvantages.

I myself have had very good experiences with Apple

So snapchat, instagram and whatsapp should run without any problems. Best hehe otherwise nothing

It is best to take a look at how the different cameras of the cell phones are, since you want to use Snapchat or Insta. When it comes to performance, the Iphone would be something for you because it performs better single core. For multitasking tasks (operating several apps at the same time), the huawai would probably be superior to the iphone. The Huswai has 120GB of storage as long as I know, more than the iPhone. I can't say how good the batteries are, since both use different operating systems. Have to look at testimonials.