I have a Micromax AQ4501 mobile phone. I am getting an exclamation mark over the Wi-Fi icon. And I am unable to connect to Wi-Fi thereafter.  I have been facing this problem since a few days after I upgraded my phone to Lollipop 5.0. I tried many things like:   switching off and then on,  replacing SIM from slot 1 to slot 2,  switching mobile data and Wi-Fi connection on and then off   but all in vain.   I called the Google call center but they were also unable to help me.   I am able to use internet through mobile internet, but unable to use Wi-Fi with this phone. My Wi-Fi is working fine on other gadgets like my laptop.   How can I resolve this problem?
When connected to the Internet, the system checks if it's in a walled garden, which is simply trying to connect to Google. If it fails, in Android 5, there'll be an exclamation mark on the WiFi icon or signal icon.   In some situations, this is annoying. Say, in China, Google is blocked, the exclamation mark will always be there, which is meaningless.  How can I disable this check, and make the system assume, connected WiFi/mobile data is connected Internet?
How to install Google Chrome Showing a recursive sequence isn't bounded $a_{n+1}=a_n+\frac 1 {a_n}$ Meaning of tilde-greater-than (~>) in version requirement? crossfade between 2 videos using ffmpeg coloring the page numbers in the table of contents Prove $A = (A \setminus B) \cup (A \cap B)$ Concatenate table without header I would like to concatenate several tables and just keeping the header in the first line (and thus not having a new header each time that a new table has been concatenate). Does anyone know how to do that?  I am currently using:  find "/dir/folder" name "*.dat" -exec cat {} + &gt;&gt; "/dir/folder/table.txt"   but I can get rid of the header with that. How do  methods compare in terms of model variance and bias?   My question is partly motivated by this thread: . The answer there suggests that models learned with leave-one-out cross-validation have higher variance than those learned with regular $K$-fold cross-validation, making leave-one-out CV a worse choice.  However, my intuition tells me that in leave-one-out CV one should see relatively lower variance between models than in the $K$-fold CV, since we are only shifting one data point across folds and therefore the training sets between folds overlap substantially.  Or going in the other direction, if $K$ is low in the $K$-fold CV, the training sets would be quite different across folds, and the resulting models are more likely to be different (hence higher variance).  If the above argument is right, why would models learned with leave-one-out CV have higher variance? How are the number of views in a question calculated? I saw it's not just a page views number, because, if I press F5 several times, it won't increase the number of views.  They could store my IP address in a table, but wouldn't that make it slow? They would need to query a database one more time for each request. Proving that $-a=(-1)\cdot a$ As the title reveals, I want to prove (based on the axioms of field) that $$-a=(-1)\cdot a$$ I've been trying for a while now, but couldn't think of a way to do it and it got me thinking that maybe its does not require a proof, but it doesn't feel right. Any ideas? In this  to a question about a series, a theorem was stated:     If $A= \{a_i \}$ is a set such that $\sum_{i = 1}^{\infty} \frac{1}{a_i}$ converges, then $d(A) = 0$, where $d(A)$ is the  of the set.   My background in number theory is basically zero and all my attempts to prove this have been utterly unseccessful; would anyone please help me, or at least provide me with a hint to prove it? How to connect to my web server? I have implemented a simple web server as a solution to a course assignment and I want to connect to this web server over the internet. I've set it up to listen on port 22881 and configured my router accordingly as the screenshot below shows    I'm able to connect to my web server locally using http://localhost:22881 and I can connect to the router's interface when I visit http://my.external.ip, but I can't connect to my web server using http://my.external.ip:22881 (I get a connection timeout). Any idea of what may be the problem?  Thanks in advance! Add a new repository to software sources Memory allocation for member functions in C++ In what order should you do linear regression diagnostics? Unzip a file with php In the sentence: "Drinking and driving IS dangerous", why does the verb "to be" need to be singular? In the sentence: "Drinking and driving is dangerous". Drinking and driving are both subjects and the word dangerous is the object (I think) but why do I have to use the verb to be in singular? Dynamic Object Intellisense How do I prevent new villager trades from spawning? When making a custom adventure map, usually you only want the trades you programmed into a villager to show up. By default, however, the game will try to spawn new trades when the last one is made. The classic way I'm seeing in tutorials to prevent new trades is to make the last trade untradeable; however, with the release of 1.7, a lot of the old item IDs that were unobtainable have been removed from the game altogether, and following the tutorial I have crashes the game when the trade interface is scrolled to the last trade.   So there's two parts to this question:   Is there a better way to prevent new trades with the 1.7 mechanics? Or with the snapshots of 1.8 mechanics? If not, what is a safe data ID to use to prevent the last trade from being a real trade as of 1.7? No, this is not a , nor is it a solicitation on  to backup or  and only a little bit about Where to backup and When to do it.  This is basically a strategy question: what, where and when all together. "How" is not really relevant: there are tons of back-up programs out there and they all do the same basic thing: make copies of data.  But the real question is: are these back-up programs making copies of the data important to you?  How should you install&amp;run Ubuntu while safeguarding your data?  There is no "one size fits all" when it comes to computers, Ubuntu versions or a backup strategy, therefore I've split this up into 5 basic user types with each their own answer:       (or you're running in UEFI mode!)   And as the above does not fit everyone, one for the impatient:   !    So click one of the above links and go to your user type!  P.S. If you're running a server farm and you've read this question so far, I'm sorry: this is about a single PC, not a network, nor a server farm.