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Whether should we buy new technological device immediately？ Nowadays, with the rapid development of technology, the process of replacement of new technological device is so quick. Thus, many people think that you should better to buy it immediately when the new technological products be put into market. However, in my opinion, I prefer to wait until others have adopted it. First of all, usually the new technological device has a higher price at the beginning of selling. That's because the technology company has invested fund to explore new product, they need to balance their cost in the exploration. Of course, if they don't set a high price at the beginning, their competitors may lower the price in the later and they may be influenced by this kind of price and therefore will lower it, too. Take my roommate for example, half years ago, he bought a smartphone with a high price about 3000RMB. This type of smartphone has some unique technology at that time to match its high price. But now, with its technology has been used by other smartphone company, the price has decreased to 1500RMB and the low price even makes my roommate regret. Second, only through a period of time, the problems or shortcomings of those technological devices will be exposed to customers. In fact, new technology doesn't mean it is perfect or better than the old one. Even some new products exist potential risks for us. I learned from newspaper that one of the most famous technological companies in The South Korean recently produced a kind of most advanced smartphone. But what disappoints the costumers who bought it is that it may explode because of some flaws in battery. So many air plane companies have prohibited passengers bring it to plane. And the company has also taken measures to recall its products. You can avoid such situations if you choose to wait until others have adopted it. Admittedly, buying it immediately can make you enjoy the advancements of technological quickly. But the speed of innovations in technological devices is dramatical.

Corrections · 4

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Admittedly, buying it immediately can make allow you to enjoy the advancements of technologicaly quickly. But the speed of innovations in technological devices is dramatical.(make/allow... I think this is 让？"make" sounds like force typically.  "allow" and "let" are more like permit 许可.  I'm not sure what you meant by "dramatic".  It's a strange sentence to end on.  "dramatic" here just means noteworthy, large, something like that... so it doesn't go with "but"... You'd have to say something more specific for the contrast.  Like "But the speed of innovations also has a downside."  or something.)
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Second, only through/after a period of time, the problems or shortcomings of those technological devices will be exposed to customers. (This sentence feels awkward.  "Second, only after a period of time will the problems or shortcomings of a device become known to customers."  "exposed" isn't terrible, but... it could sound strange here... "He was exposed to dangerous levels of radiation."  You could also say "Only after a period of time do problems with a product become apparent to customers."  etc., etc..) In fact, that technology is new technology doesn't mean it is perfect or better than the old one. ("one" is not so good when referring to "technology" which isn't really a countable noun here.  I changed it with "that" because of "mean"... the technology itself, one might say, doesn't "mean" anything.  Only the qualifier of its being new might mean something or not. To say this differently "New technology is not necessarily perfect or even better than the old.")Even And with some new products even potential risks may exist potential risks for us.(This sentence was sort of okay before but this is a little more natural.) I learned from a/the newspaper that one of the most famous technological/technology companies in The South Korean recently produced a kind of most very advanced smartphone. (Definitely "technology" here.  "technological company" sounds like a technologically advanced company that doesn't necessarily make technology products.  Maybe they make wooden cabinets with ornate carvings but it's all done by computer. "South Korean" is either an adjective or a person from South Korea.  "most" does not usually go with "a kind of"... "a kind of" suggests a class of things, whereas most would be a single superior case. )  But what disappointsed the costumers who bought it is was that it may explode because of some flaws in the battery. (I think this is past tense, right?  It was a little while ago?) So many air plane companies have prohibited passengers from bringing it onto planes. (Careful about "so many".  When spoken like "So, many..." it sounds like therefore, i.e., multiple companies have prohibited passengers bringing these phones on their planes.  But "So many" sounds like a lot, like very many.  "There's so many different kinds of fish in the ocean, or there used to be.") And the  phone/tech company has also taken measures to recall its products. (Make sure this company is distinguished from the airplane companies in the previous sentence.) You can avoid such situations if you choose to wait until others have adopted ittechnology.("it" is a little ambiguous.  maybe "adopted a piece of technology" could be good also.)
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First of all, usually the new technological device has a higher price at the beginning (of selling). ("of selling" sounds strange here and it's really implied by "price".)That's because the technology company has invested funds to explore develop the new product, and (as a result,) they need to balance these costs. their costs in the exploration. (or "to develop new products".  "explore" sounds strange like "deep sea exploration."  You could use it with products and research and development in certain contexts, but not this one.  For instance "We're exploring new revenue streams." This sounds like a company generally looking for new ways to make money.  "I think we're done exploring that avenue."  So here, "avenue" is, like a street, it's a direction to research for something.  So this is all more general, not for a specific product, or a specific thing. You could also say "...has invested funds in developing the new product, ...")Of course, if they don't set a high price at the beginning, their competitors may lower their price in the later and they may be influenced by this kind of that price and therefore will lower ittheirs, too. ("don't" doesn't make sense here.  If they don't set a high price in the beginning, then their competitors can't undercut their price.... right?) Take my roommate for example, half a years ago, he bought a smartphone with a high price of about 3000RMB.(Or an appositive: "a high price, about 3000 RMB") This type of smartphone hasd some unique technology at that time to match its high price. But now, with since its technology has been used by other smartphone companies, the price has decreased to 1500RMB and the low price even makes my roommate feel regretful. ("with" needs a different tense... "With its technology now co-opted by another smartphone company, ... "With its technology now being used by another smartphone company"  and with "other" it's not just one other, so you need the plural.  "regret" feels like it needs an object, so I changed it a bit.  And "at that time to..." so it's in the past, at the very least, the technology was unique to that company in the past, so "had")
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Whether should (or not) we should buy new technological devices immediately？("or not" is not really necessary but it implies a kind of pros and cons discussion.  "devices" because it's a general discussion of devices in general, not just one device.)

Nowadays, with the rapid development of technology, the process of replacement of the potential turnover of new technological devices is so quick. (You used "nowadays" correctly, but this word sounds like slang to me.  And I posted that on someone's notebook and someone from Great Britain said that no it was not slang but just used incorrectly in that other person's notebook.  The thing is... "nowadays" might not quite be slang, but it's a word composed of other words slurred together "now a days" which is not proper grammar.  So it doesn't sound good.  It's not wrong, and you didn't use it incorrectly, but I would not use it in writing myself.  "process of replacement" would mean something like, for instance, the way to replace the battery in a phone.  Or if if a company had a "process" one had to go through to get a product that had malfunctioned replaced.  "replacement" suggests something total.  The old battery doesn't work, it has to be replaced.  Etc.. whereas with new technology, it's more like something is slightly better, the old would do just fine.  I don't know exactly what you meant here and I added something very specific.  "turnover" means something like replacement but has a business connotation or,  something like that, and I say potential because the devices don't have to be replaced.  "Because this job is so terrible, we have very high employee turnover and we have to keep training new employees as the old one's quit."  If you wanted to say something else, you could change the sentence entirely.  I.e.,  "With the rapid development of technology, there's always some new device consumers are enticed to buy.") Thus, many people think that you should better to buy it immediately when the new technological products be is put into the market. ("it" does not go with plural "products".  "better" feels strange here.  "You would be better off doing this."  "You had better do this before that happens."  "You should do this as soon as you can."  "It is better to do that sooner rather than later." I've forgotten just now but 应该 is used in some situations that are different somehow than "should" in english.  "technological" is starting to sound strange to me.  I think "technological progress" "technological development" something general, academic... with products... "technology products" might be okay... I don't know, it's okay either way.  A better phrase with "market"... "As soon as the product hits the market..." "We expect a full return on investment, three months after our products go to market." Something like that... )However, in my opinion, I prefer to wait until others have adopted it.

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