I-phone and I-pad without a doubt would have to be the important invention that affects human beings. = I-phone and I-pad without a doubt would have to be some of the important inventions that affect human beings.
Steve jobs who is pioneer of Apple and passed in 2011 was a creative person to invent high tech devices such as I-phone or I-pad. = Steve jobs who is pioneer of Apple was a creative person to invent high tech devices such as I-phone and I-pad.  He has led to technology innovation as well as the advancement of cutting edged smart gadgets. =  He has led technology innovation as well as the advancement of cutting edge smart gadgets.
These electronic applications revolutionized modern society and thanks to Steve Jobs most people have a convenient and comfortable lifestyle. To be more specific, we usually keep in touch with old friends who are in abroad using face time. = To be more specific, we usually keep in touch with old friends abroad using face time. And whenever we study or work, these smart electronics helped our tasks faster and easier. =  And whenever we study or work, these smart devices help make our tasks faster and easier. We also easily access the latest information about social affairs whenever or wherever we are.
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There are a couple of reasons how it has influenced mankind
I- phone and I- pad doesn’t only help me to call and communicate with my loved ones abroad but I used it to have my ielts classes online as well. = I- phone and I- pad do not only help me to call and communicate with my loved ones abroad but I use it to have my IELTS classes online as well. You see, (as you may know) I had been preparing for my ielts exam for almost a month now. = You see, I have been preparing for my IELTS exam for almost a month now. I am taught by an ielts trainer and we meet every night at around 6pm to be updated with the latest questions and strategies. = I was taught by an IELTS trainer and we meet every night at around 6pm to be updated with the latest questions and strategies.

I still remember, the first time I saw the latest I-phone in my friend’s house, it was so attractive that I can help
Looking at it, so when I touched it I was surprise that is so light and smooth then I told myself I would buy the same laptop next month. = 
I still remember, the first time I saw the latest Apple laptop at my friend’s house. It was so attractive I can't help
looking at it. And when I touched it I was surprised that is was so light and smooth. I told myself then that I would buy the same laptop next month.