Obviously, beyond its physical appearance, on which its price will also depend, since being impeccable is not the same as having certain signs of wear, you must first check that it works. You would not be the first person who trusts when buying a mobile in a hurry and, when you get home determined that it does not even turn on.
Take time to analyze the mobile both before buying it and when you have already purchased it and you are going to pay because you could get more than one surprise. Don’t be afraid to waste the seller’s time because you have to make sure you make a good purchase.

Know the health of your battery
The fact that the mobile is on and does not turn off while you are testing it does not mean that its health is good. Taking into account that making a replacement is an additional and important outlay, and that the mobile has already been used, it is important to know if the battery is going to work in good condition for much longer or is about to die.
On iPhone, checking the health of the mobile is very simple. You just have to follow these steps:
- Go to Settings
- Select the Battery option
- Check Battery Health
- Check how it is in Maximum capacity
On Android it is more complicated, and only some models make it easy for you, so do not hesitate to download an application to check the health of the battery . Installing the application and accessing this data will not take you more than a few minutes and will give you peace of mind knowing how much battery life is left on the mobile you are buying.
Although in this case you can find several options, we recommend AccuBattery for being complete, easy to use and safe.
If in the results you see that the health of the battery is not good , what can happen is that it lasts much less time after charging, you have to do it more frequently, it affects the performance of the mobile and even at some point it ends up running out. the point that it is totally useless (at least until you change it for a new one).
Other things to look at
In addition to the health of your battery and that it appears to be fine, there are other things to look out for:
- The price is correct? If you have analyzed the market, you will surely have checked if the price is correct or you can find something at a better price taking into account its condition, proximity and other aspects that may influence you. If it’s too good to be true, be wary.
- The guarantee. If you buy it from a private individual, surely you cannot expect too much, however, if you do it in a second-hand store, you will have a one-year warranty. As the latter will surely be more expensive for you, assess what is most important to you.
- Test its basic functions , check the Internet, take a photo with the camera, send messages, make a call to make sure the sound and speaker work well, open various applications, etc.
- The updates. Find out if this model is going to receive more updates or is already being outdated.
- All data is erased. Believe it or not, there are people who sell the mobile without deleting anything, and this can be a future problem. For example, if you want to restore the mobile and it asks you for credentials that you do not have because they are those of the seller.
- Make sure that it is free or at least that it is from your operator. Although today most mobile phones are not subject to any operator, it does not hurt to make sure.
- If you are going to buy it online, do it in a recognized store and make sure that the seller is trustworthy.