AETGSM. Center

Buying and selling guides

The same things we check before buying a device. A few minutes to read, a lot of trouble saved.

IMEI check: how to tell if a phone is stolen or blocked

The first check on any used phone. Two minutes that can save your money.

Read →

iCloud and Google lock: the costliest mistake when buying second-hand

A phone still tied to someone else's account cannot be used. Here is how to check before paying.

Read →

Battery health: what percentage is acceptable and when the reading lies

The number in settings matters, but on its own it is not enough. Here is what else to check.

Read →

Screen and body: how to assess condition in 5 minutes

Dead pixels, stains, colour shifts and signs of opening — what to look for and how.

Read →

Second-hand MacBook: battery cycles, keyboard and what else

Laptop checks differ from phones. Here is the concrete list for a MacBook.

Read →

Second-hand tablet: what to check and what does not matter

Tablets see gentler use than phones, but they carry their own specific risks.

Read →

Before you sell your phone: backup, sign-out, reset

Three steps in the right order. Get the order wrong and you either lose data or hand over a locked phone.

Read →

What your phone is really worth: how the price is set and why it falls

The model is only the start. Storage, condition, completeness and season move the price both ways.

Read →

A safe deal: where to meet, how to pay, what to ask for

Most scams stop with three habits. They take minutes and cost nothing.

Read →

Warranty on used devices: what it covers and what your rights are

A commercial warranty and statutory liability are not the same thing. The difference matters.

Read →