I disagree. People usually seem to like big things... especially when it comes to phones.

How to do the backup???

Erm, I'm afraid no. You get the same amount of pixels, it just may lack some details, look smudged etc.. But the resolution stays the same. If you save a photo at half the resolution, but so that it reaches the same file size, the result will look different. Especially when you zoom in to 100% on the full resolution low quality photo, and zoom in to the same point (200% I guess?) on the half resolution (2 instead of 8 MP I think) high quality photo. Huge difference.

not only phones bro, not only phones lol 

Do a NANDROID backip before you do so.

Looks like this backup works only on rooted phone. Same for TWRP and CWM mentioned by others. Too much for this uncle lah.  My phone unrooted so can I just upgrade as it is and hope for the best? 

About which contact backup apps is good ?
I tried a few contact backup but when I restore it didn't show which Sim1 or Sim2 caller and call was done with an empty small box.

Which backup tools for contact and call and sms which show sim1 or sim2 output ?

Since I just received the 1S I could test the camera. It will always take 8 MP photos, no matter if low, standard or high is set. It is just how much it compresses the photo that is different.

The GDex boy btw. forgot the phone on his motorbike... had to go down again to fetch it. He was friendly though. I really wonder why it took them so many attempts to deliver it though, because it's not like he could have delivered a lot of packages on his bike.
I disagree. People usually seem to like big things... especially when it comes to phones.

As for MP etc... I'm afraid you're wrong. The sensor size and the sensor design determines how much light goes in. Some sensors need to have quite some space between each pixel, some get them more closely together. Every pixel is able to collect a certain amount of light. How big the pixels are thus depends on the number of pixels (the more pixels, the smaller they have to be for a given sensor size), how big the sensor is (in a phone it's usually somewhere between 1/6" and 1/2.3", the high end Nokia camera phones go up to 1/1.5" or even 4/3" I believe... not sure now. DSLRs are much, much bigger than that) and how the sensor design is (backlit sensors are better, because the electronics are on the other side, older sensors had all the electronics at the side where light hits the sensor, thus losing a lot of space). The bigger the pixels are, the better will the phone perform in low light situations. That is why Sony's A7S is basically a night vision goggle, it sees more light than your eyes do! Huge sensor, only 12 MP, and a modern sensor design. It is amazing.

Unfortunately in camera modules for phones, lower resolution sensors are usually smaller too (case in point 8 MP Sony sensors tend to have around 1/4", 13 MP Sony sensors around 1/3" and 20 MP Sony sensors should be around 1/2.3" I'd guess. In the end, pixel size stays more or less the same... a 6 MP 1/2.3" sensor would be pretty good in the dark). The HTC One is an exception there. Btw., the bigger the sensor, the bigger the lens has to be too, leading to bulky camera modules. We could have so much better cameras if we were willing to sacrifice slimness. Then finally there's the thing about aperture... the wider open it gets, the more shallow depth of field we get, and the more light is collected for the sensor. (f2.0 is better than f2.8). Means bigger lenses though.

The part of compression is right though. Low quality = high compression = when you zoom in it's a blurry mess with artefacts, where the same photo at high would be sharp and clean.

Back to the test I've done earlier: Same photo, more or less, at low 580 kB, standard is 1.05 MB and high is 2.66 MB.

2 or 3 days buffer so wont be so disappointed

Sorry I am a noob noob here only know how to call and message and play game with phone...how do I actually do that? Which version of firmware is currently the most stable one?

Erm, I'm afraid no. You get the same amount of pixels, it just may lack some details, look smudged etc.. But the resolution stays the same. If you save a photo at half the resolution, but so that it reaches the same file size, the result will look different. Especially when you zoom in to 100% on the full resolution low quality photo, and zoom in to the same point (200% I guess?) on the half resolution (2 instead of 8 MP I think) high quality photo. Huge difference.

I thought that /k/ thread was deleted?

not only phones bro, not only phones lol 

Looks like this backup works only on rooted phone. Same for TWRP and CWM mentioned by others. Too much for this uncle lah.  My phone is still "virgin" and unrooted so can I just upgrade as it is and hope for the best? 

Erm. If you want to do a backup, doesn't MIUI offer to do a backup before upgrading? Also you can ask it to manually do one...

Anyone ?
Still dont get it , what's 1/2 compare to f2.0 ? compare to high end note 4  1/2.6-inch 16MP BSI CMOS unit with F2.2 maximum aperture ?

The latest version of the MIUI Global ROM for Redmi 1S is V37. You can get it from MIUI forum. Just flash it using the stock recovery.

mine still 35.1 and it cant auto detect the update. lazy to flash manual

lately i do noticed it sort of hanged during call or call cancelations.

anyone have this problem?

Looks like this hang issue is quite common for 1s, how come no one mention anything about this in those review that i had read or watch ??

Quite worry right now, a bit regret right now. No wonder so many gift for this phone 

Looks like this hang issue is quite common for 1s, how come no one mention anything about this in those review that i had read or watch ??

Quite worry right now, a bit regret right now. No wonder so many gift for this phone 

as far as I know, 1s does have a lite mode
using lite mode should reduce some of the probs ?
anyone here can confirm this ?

mine still 35.1 and it cant auto detect the update. lazy to flash manual

lately i do noticed it sort of hanged during call or call cancelations.

anyone have this problem?

Looks like this hang issue is quite common for 1s, how come no one mention anything about this in those review that i had read or watch ??

Quite worry right now, a bit regret right now. No wonder so many gift for this phone 

I actually considering get another phone in the very near future so worst come to worst this 1s going to be my backup phone .. i usually dont multitask with phone so hope the hang issue wont happen that often to me 

So how long actually this Xiaomi brand ?? Whats their reputation actually ??