Tried and true method. This technique in summary is as follows:
Use a basket for this.
Fill up your basket with sensible grocery items enough to hide the electronics you want.
Grab a BAG of cereal to cover most of your basket contents entirely.
Go to electronics department with basket full of food and grab you item, put it in the middle of your basket to be covered on all sides and top with cereal.
Go back to grocery department and remove spider/open keeper box(if needed).
With spider off/box open and cereal covering item and most of your basket, go to the freezer aisles and open one of the freezer doors, put your basket down on the knee high wall of the freezer that is underneath the open door. You should have the freezer door on one side, freezer shelves and food on the other, basket in front of you resting on freezer, back facing outwards of all this.
Once you are pretty much inside the freezer, ditch the spider/box in there behind and underneath some food far in the back, also take your item and conceal it up your shirt or down your trousers whatever, this is called the freezer technique(betcha can guess why!) and grab some food from the freezer before closing the door. This should be done smooth and quick, make it look natural and fast, should be no more than 5 seconds from open door to shut.
Make sure the cereal is still covering where the item was, so nothing looks to have changed at all.
Head to the bathroom now. Quietly open the package and remove all remaining security tags, wad them in some TP and flush them down the toilet. Don't let anyone see or hear you do any of this, unless you are certain they won't bust or contribute to busting you. Stuff your thing down your pants and now you're ready to head out!
Walk back out the bathroom and grab your basket, go stand in line for a cashier to ring you up. While in line check the exits for security, if there are more by the doors now, 3+ or just more than normal, be weary, you may have given yourself away but doubt it. Just use this time to make sure your exit it clear, if you don't want to do this or don't have to, just walk straight out from the bathroom.
In line once you've scoped the exits and are certain they are clear, also checked for followers, your item is in a good spot and free of all security tags, tell the cashier you left your wallet or debit card whatever in the car and you will be back, let other people ahead of you bllah blah now head for the door and you're free!

This in total should take no more than ~15 minutes from enter to exit.
Baskets are needed to do this properly, the small half carts are second choice because you can still hide YOURSELF in between the freezer doors and have the cart pulled in a little bit, you mostly just want to have your hand covered by the cereal when you ditch the spider/box and pocket the item. Using the freezer is all about distorting vision of the conceal and if your arm is clear as day grabbing a kepper box from your cart and tossing it in the freezer then that is no good. Keep yourself covered, it can be done with a basket, half cart, regular cart, shopping bag, nothing, just use your own discretion and judgment of it.

Use a basket for this, without a basket you cannot hide yourself inside the freezers later on in the run, the smaller half carts are second best, regular carts not good and maybe someone should figure out a solution for this.
Grab grocery items that make sense, ingredients for 2 person dinner, milk cereal eggs bread sugar coffee, don't go crazy but you are trying to put on like you are shopping for groceries and grabbing an electronics toy or whatever while you're at it.
The bag of cereal is absolutely CRUCIAL! The time at which you choose to grab it is variable though, personal preference really. Before going to electronics or after, before makes you have to move the bag to put your item underneath it, after and your item gets covered naturally when you put the bag in. Personal preference.
Put your item in a spot where you can sneaky as fuck like open the box or unbuckle the spider with one hand under the cereal bag. This could be done in a freezer also to try and hide even more, again personal preference. You definitely want your item ready to conceal by the time you hit the freezers though, too much time in there looks really bad!
Using the freezer to cover up your conceal is what this entire run is built around, the most important part of the entire operation. The doors should get foggy while they're open and cover you up even better, the steam of your hott bawd should help too, all in all there should be no vision of you concealing.
You can go to the freezer for two separate motions, one to conceal, one to ditch the box/wrap. If you're good do it in one and grab a few foods with your hand on its way back to yourself, this should be very fast, 4-5 seconds MAX and done smooth and result in the box/wrap being hidden for days to come and your basket looking as if nothing happened except it gained the frozen food. Make sure your cereal is still blocking view and everything looks unchanged.
If you need a second freezer stop to ditch it, do so in a sensible manner. don't first grab rocket pops fudgsicle combo then a bag of frozen eggplant, that shit don't make no sense.
Once you have your item hidden and tags gone head directly to either the checkout line or bathroom, personal preference here, use the line to first check for extra guards at exits and make sure you weren't followed, go straight to the bathroom to cut down time. If you went to the bathroom you need to get it line afterwards to check for guards and followers, don't B-line it for the doors and get caught.
In the bathroom be weary of other people in there, mostly cautious of employees possibly listening to boxes opening stickers begin removed(yes they do this!). Use toilet flushes to your advantage and every time it happens open the box more or rip the tags off or just make progress. Box can be opened and item removed in 1 flush easy. Flush your own toilet if needed, the sensor toilets are great for this because they go flushing by themselves all the time anyway. Get all the tags off and flushed then you're ready to go.
Exiting the bathroom go back to your basket and check all guards by exits and around you, if there seem to be excessive amounts gathering, be weary they are expecting something.
Ditch your basket in the customer service area is best, after telling the cashier you forgot your wallet or card and can't buy anything, it all needs to get put back. You don't have to do this, but it looks more natural in the big picture, and putting it in the customer service area yourself, you can put it not in the first spot the shelf stockers will go to, giving you the most time before anyone notices your electronics are no longer in the basket, should they ever notice.
After all that crap gtfo and pat yourself on the back for not being original at all then in full voice yell Hot Carlito getting jiggy wit it-naw naw naw ne naw naw.
Guaranteed to work as long as you don't fuck it up like any other lift. This can work for any item in the store small enough to conceal, in any store with a freezer, with a ton of variation.
This is just a tried and true method with many successful lifts. The only situations that resulted in aborting was when the keeper box/wrap wouldn't come off. Never had to ditch an item outside of the box or wrap, but leave the item in the full basket inside the box or wrap actually quite a few times, some boxes seem like magnets just won't fucking open them. This is an abort because of magnets or keeper boxes though, nothing related to the method itself. Very fool-proof and safe. You can practice this in local grocery stores to establish a routine and familiarize yourself with the freezer technique. Also practicing with or without a cart is good to do. Get used to making it natural opening the freezer and putting yourself up in there a bit, like you need to grab something from the back of the top or bottom shelf. You can test which parts of the freezer are getting restocked the most by putting other food items in other parts of the freezer, then see how long till it gets put back. Sometimes weeks can go by before the spider/box are removed and that is perfect. When you're ready, hit wally world and video games and dvds and headphones anything not locked in a case is up for grabs. Have fun!