Quote:
Originally Posted by Fabio0052
are regular model able to open any PDF . . . .
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Yes, but that doesn't mean the PDF can be easily read.
If the PDF is simply an almost totally unformatted text document, there is little problem, as it can be easily converted using one of several tools. Even the Save as Text option built into the free Adobe Reader may be good enough. I hardly ever see such simple PDF's, but you may.
If the PDF has tables and charts, this won't work well. And if the PDF consists merely of graphic files, it won't work at all.
Sometimes you will find a PDF which has little complexity except for there being multiple columns on the page. There are conversion tools for these, but use may not be simple.
For complex PDF's, the Fire would be better but maybe still too small.
A Kindle Keyboard 3G purchased and registered in the US can currently get unlimited free cell-phone-based internet service in built-up areas of your country. This also is only good for content with simple formatting, although there are tools for simplifying web pages that can help, like readingthenet.com. But once Amazon realizes where you really live, such as if you use a bit of your $400 a year to purchase their content, they might throttle back the cell-based-internet to Wikipedia only.
Since it may be hard for you to get warranty service, frequency of repair becomes an issue. As far as I know, the Kindle is flying under the radar of the consumer magazines, in the US and Europe, that track such objectively. However, if you look at the satisfaction ratios for various Kindle models, the Kindle Keyboard may stand out for not having a lot of reported problems. And reading this board a lot, I get the impression that a lot of original Kindle 2nd Generation owners have never had a problem. The 2nd generation screen contrast isn't as good as with later eInk models, but after a day or two I don't think it would bother me. If you have a friend in the US that could order one in like-new condition from the Amazon marketplace, and get it to you without legal risk, I would consider it.
A quick web check fails to determine whether rolling electrical blackouts are a real problem in your country, or rare. If common, or at risk of becoming common, this would argue against the Fire, which needs daily recharging.