Useing smartphones more Using smartphones more

Useing smartphones more Using smartphones more

I do believe 99% of the population isare using smartphones. I believe 99% of the population are using smartphones.

But maybe less thean 1% can fully use all the functions fromon a smart phone. But maybe less than 1% can fully use all the functions on a smartphone.

Learning new knowledgesomething new is always difficult. Learning something new is always difficult.

But today/nowadays I use my smartphone upload a video is on YouTube. But today/nowadays I use my smartphone upload videos on YouTube.

If this is a general comment, "nowadays" is more appropriate. Saying "today" suggest to me that it's specifically the current day that you upload one video on YouTube.

I also write a short diaryies and post ithem from my smartphone. I also write short diaries and post them from my smartphone.

I say that it's not difficult at all. I say that it's not difficult at all.

Furthermore, there are many features that you can add to the videos and text to make it more appearling. Furthermore, there are many features that you can add to the videos and text to make it more appealing.

It's not quite clear what you mean by "appearing", I presume you meant "appealing"?

Now, I do think a smartphone iss are more powerful than a computers. Now, I think smartphones are more powerful than computers.

You typically use "I do + verb" for emphasis that is linked to some related sentence or question. E.g. "I don't like most sports, however I do like football"; using "I do" there emphasises particularly how I like football in contrast to other sports which I don't like. You wouldn't typically use "I do + verb" as a standalone sentence like you've done a couple of times in this post.