Is This Your Card

When I see the words "free trial," I know I'm probably going to have to whip out my credit card and enter in the number to "not get charged." Then I end up forgetting about the trial and want to kick myself in the ass when I see my statement at the end of the month. In order ...more

The new HTC One (M8) is a large phone, no doubt about it. Still, with those BoomSound speakers, 5-inch display, and 2600mAh battery, it's a wonder they managed to cram everything in that gorgeous, unibody metal shell. By that logic, it makes sense that the M8 makes the switch ...more

Unlocking your Samsung Galaxy S4 so you can use a different SIM card isn't the easiest thing in the world. In the states, unlocking cell phones was actually illegal, despite the White House's disapproval, though, a recent bill has making its way to the House floor and has made ...more

Apple's Wallet app lets you store boarding passes, concert tickets, gym memberships, vaccination cards, movie stubs, rewards cards, insurance info, student IDs, and more in one place on your iPhone, and you just double-click the Home or Side button to access them. Unfortunatel ...more

Most people don't ask for gift cards, but they're always a popular gift choice for notoriously hard-to-shop-for people—or the time-constrained gift-giver. While most gift cards are attached to certain stores, many folks will get a prepaid Visa or MasterCard card that allows th ...more

One draw that Samsung's Galaxy S line has had over the Google Nexus 4 and 5 and the HTC One (though the M8 appears to be following suit) is expandable storage. Pop a microSD card into the slot and you have extra storage for music, photos, and even apps themselves in some cases ...more

Using only a circle and straight lines, it's possible to create various aesthetic curves that combine both art and mathematics. The geometry behind the concentric circle, ellipse, and cardioid dates back centuries and is easily found in the world around us. From an archery tar ...more

Computer Science Professor Francesco De Comité has a fantastic gallery of mathematical images on Flickr. As part of this collection, he has a few hundred images of real or rendered polyhedra made out of paper or playing cards which he calls "slide togethers." These are constru ...more

You've probably noticed how we like to stress the importance of a strong password. After all, there are still people out there who continue to use passwords like 123456 and even just "password". But passwords aren't the only barriers that protect your information. According t ...more

It used to be that you only had to worry about maids rummaging through your belongings in your locked hotel room. But now anyone with 50 bucks of hardware and some programming skills can hack their way in—as long as it's locked by keycard. At the Black Hat security conference ...more

With great power comes great responsibility, and when it comes to modding Android, nothing is more powerful than TWRP custom recovery. As easy as it is to replace your phone's entire OS with a custom ROM, when things go awry, you can also be left with no operating system at al ...more

Do you have an Alfa AWUS036NH Wi-Fi adapter that claims it can go to 2000 mWs, or some card that can supposedly transmit power over 1000 mW? If so, you may have run into problems setting your card's TXPOWER higher than 30 dBm, which is about 1000 mW. Well, I will show you how ...more

Definition Judgment is a game where you have to predict the number of hands you'll make and try to make those number of hands that you predict. It is a game usually for 3 or more players. Even 2 players can play but then the game won't be that interesting. 5 players can play ...more

Many Android games use large, storage-heavy OBB files to store supplemental data. Generally, games with high-end graphics download these extra files when you install them from the Google Play Store. Most OBB files take up more than a gigabyte of space on your internal storage ...more

Briefing Playing cards are used to play Killer but Killer is not exactly a card game. You cannot play this game if you do not know how to wink. I do not recommend that you go about winking at men and women to practice for this game. A minimum of 4 players are required to pla ...more

Computer crashes, fried hard drives, red rings of death, delinquent memory cards... nothing is worse than dysfunctional technology. In just a minute, your favorite and most used device has become the biggest headache of your life, frustrating you to the brink of madness. But w ...more

Have you ever wondered how credit card numbers work? I mean, how they really work? How do they come up with the numbers? Credit cards actually follow a very specific pattern. Let's take a look at how they're set up. Example of a Credit Card Number 4485 3151 5882 2849 These ...more

You can't predict the future, but you can prepare for it. On the off chance that you get hurt in a car accident, take a nasty tumble, fall down a cliff, have a seizure, or get struck by lightning, it's always good to carry up-to-date information about your health in case you c ...more

In the tech world, it's all too common to slap a fake label and packaging on a lower quality product, especially SD cards. If you've ever bought an SD card on the cheap from a slightly-less-than-reputable source (or even a reputable source, in some cases), how do you know if i ...more

Let's say you receive $10 from a friend through Apple Pay Cash via an iMessage. You could spend that money in the App Store or at any retailer that supports Apple Pay using your Apple Pay Cash card. If you'd rather save it or use it for bills, it's easy to transfer that money ...more

Planning on getting the iPhone 5, but want to keep your SIM card? The new nano-SIMs that manufacturers are adopting will be even smaller than the micro-SIMs that most of us currently use. It's fairly easy to cut a regular SIM down to a micro-SIM, but because the nano-SIM will ...more

I've never understood gift cards. Aside from being severely restricted as to where you can use them, they're also a strange gift, especially if you don't shop at that particular store. Some even have expiration dates and service fees. The biggest problem I have with gift card ...more

Samy Kamkar, the security researcher known for the MySpace Worm and his combination lock cracking skills (using an online calculator), is back—and this time, he's after your credit cards! Well, not really, but his latest project, dubbed MagSpoof, can spoof any magnetic stripe ...more

This is a game played by 2 players. It cannot be played by more than 2 players and is played using 30 cards. Regular jokers have no role here. However there are 2 additional jokers, the seven of hearts which is the big joker and the seven of spades which is the small joker. C ...more

Whether it becomes mandatory or not to show your COVID-19 vaccination card at events, restaurants, bars, hotels, airports, and other public places, it's a good idea to digitize the paper card on your smartphone so that it's always with you. It's also wise to give yourself quic ...more

The Wallet app on your iPhone can be used to store and access event tickets, loyalty cards, boarding passes, gym memberships, airline miles, gift cards, coupons, and more — all in one centralized place. Before doing so, though, you must add your passes to Wallet, and there is ...more

Definition Declare is a card game played by 3 or more people. If 4 people are playing the game, then one pack of 52 cards (without the jokers) is sufficient. For 4 to 8 people, two packs of cards are required, without jokers. Aim & Objective To have the minimum number of po ...more

Your Galaxy's lock screen already lets you know there's no SIM card installed if it's missing on your device, so there's really no need to have a persistent icon for it on the status bar. If you want to hide the pesky symbol and accompanying notification for good, there's a ni ...more

If you have ever wondered how to teach kids to play cards then this is the game to start with. This is the best game to teach your kids and educate them about playing cards. The words "Jack Thief" are derived from the Hindi words "Gulaam Chor" as the game is called in Hindi w ...more

In many ways, the Galaxy S9 is a holdout from the golden days of Android. It's one of the last major flagships to sport a headphone jack, it has an impressive array of internal sensors, and perhaps more importantly, it's got a micro SD card slot. If you're in the market for a ...more

With an ordinary birthday card, we can introduce a physical device which contains malicious files into someone's home and deceive them into inserting the device into a computer. In my last series, we used a Post-it note to trick a neighbor into visiting a website that we cont ...more

Do you have a junk drawer full of expired gift cards, membership cards, school ID cards, debit and credit cards, and other sturdy rectangular pieces of plastic you no longer use? Rather than tossing or shredding them, you can use them to scrape ice off your car windshield, or ...more

If you have an older Samsung Galaxy Y smartphone, one thing you should be doing is using an microSD or microSDHC memory card to help improve your Android's processing speed and make it easier to transfer large or small files easily. These cards are also compatible with certain ...more