How to prepare your phone for sale?

Back up your data, charge your phone, prepare passwords for your Apple or Google accounts, check basic functions, and take your box and accessories if you have them. Don't erase your device until you're sure your photos, contacts and messages are safe.

Can I still sell a used phone at Sklep Sympatia in Łomża?

Yes. Sklep Sympatia is now mainly a phone shop and repair service, but it still buys selected used phones. That is why some customers continue to search for the former phrases "komis Sympatia" or "komis Łomża".

Do I need to factory reset before quoting?

Do not do this before making and checking a copy of your data. The phone should be wiped before being passed on to another person, but it is best to agree on the moment of deleting accounts and resetting during the quote.

Do I have to log out of iCloud before selling my iPhone?

Yes. You'll need to sign out the Apple account you use for iCloud, turn off Find, and make sure Activation Lock is gone. An iPhone remaining on someone else's account cannot be configured normally by a new user, so its value may drop to the value of functional parts.

Can I sell my phone without the box?

The box does not indicate the technical condition of the phone, but a complete set may be more attractive. Take the packaging, cable, charger and proof of purchase if you still have them. For an incomplete set, you can call the store in advance.

How much will I get for a used phone?

The amount depends on the model, memory, condition of the screen and housing, battery condition, operation of components and the lack of account bans. A reliable quote is only possible after checking the specific device.

Where to sell a phone for cash in Łomża?

You can bring the phone to the Sympatia store at ul. Krótka 3 in Łomża. After checking the device, accepting the quote and completing the formalities, you will receive the money immediately.

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How to prepare a phone for sale

13 July 2026 · 8 min read

Used smartphone placed on a box before preparation for sale and valuation

Before selling your phone, make an up-to-date copy of your data, check your Apple or Google account passwords, charge your device and prepare the box and accessories if you have them. Don't do a factory reset right away. First, make sure your photos, contacts and messages are safe, and agree on the moment to log out of your accounts and clear your memory during the quote.

Many people still search for "komis Sympatia" or "komis Łomża" - the Polish terms they remember from when the business operated more like a phone resale shop. Today Sklep Sympatia is mainly a phone shop and repair service, but you can still sell your mobile phone at ul. Krótka 3. After we check the device and you accept the valuation, payment is made straight away.

What to prepare before selling your phone

Charge your phone and check if it starts up without any problems.
Make a fresh copy of your photos, contacts, messages and important files.
Remember the lock code and password for your Apple, Google or Samsung account.
Check the operation of the screen, cameras, speakers, microphone, charging and buttons.
Prepare the box, cable, charger and proof of purchase if you still have them.
Remove the memory card and remove the SIM or eSIM card only at the appropriate moment.

Your phone doesn't have to look new. It is important that its condition can be honestly checked. Don't hide cracks, charging problems, a weak battery or previous repairs. Reliable information speeds up the valuation and avoids misunderstandings.

A phone with a photo gallery prepared to make copies before selling the device

Secure your photos, contacts and messages first

The most important step before selling your phone is a copy of your data. You can use iCloud on iPhone or a copy on your computer. On an Android phone, check a copy of your Google account, Google Photos, Google Drive, and on Samsung devices also Smart Switch. Just because a photo is visible in the gallery does not always mean that the original is in the cloud.

Open some of the oldest and newest photos, check the number of contacts and important conversations. If you are changing your phone, it is best to complete the data transfer and only then delete the old device. For detailed instructions, see our guide on transferring data between iPhone and Android.

Don't reset your phone too early

Restoring factory settings protects your privacy, but if done too early, it may make it difficult to check your phone or permanently delete data that is not in the backup. Before the quote, prepare a backup and make sure you remember your login details. Simply deleting photos from the gallery is not the right way to prepare your phone for handing over to another person.

After accepting the quote, you need to properly remove the accounts and owner locks and then clear the memory. On iPhone, this means signing out of your Apple account, turning off Find, and erasing your content. In Android, you need to delete the Google account and other manufacturer accounts, and only then perform a reset from the settings level. This will prevent your phone from being activated.

Are you selling iPhone? Sign out iCloud and turn off Activation Lock

Before selling your iPhone, you must log out of the Apple account used in iCloud and turn off Find. You'll need your Apple account password to complete these steps. Simply deleting the contents of the phone is not always enough - the device may still remain assigned to the owner and request his login details when turned on.

If you forgot your password, first regain access to your account or delete your device via iCloud.com. A phone with an active lock cannot be configured normally by another user. Its resale value then drops significantly, and the valuation may be limited to the value of functional parts.

The same applies to the iPad and Apple Watch: the device must be removed from your Apple account and Find before being sold. Do this only after checking the data copy, but definitely before handing over the equipment.

Don't know your Apple or Google account password? Regain access before your visit. The screen passcode allows you to unlock your phone, but it does not replace the password needed to delete your account and activation lock.

SIM card, eSIM and memory card

The physical SIM card and memory card must be removed before leaving the phone. In the case of eSIM, first make sure that the number already works on the new device or that the operator will allow reactivation. Do not delete your eSIM profile blindly if it is the only active access to the number needed to log in to the bank, post office or instant messengers.

What affects the valuation of a used phone

Elements checked when pricing a phone

Model and memory

What matters: Exact phone version, memory capacity and device variant
What you can check beforehand: Check the model name and capacity in the settings or on the box

Screen and housing condition

What matters: Cracks, deep scratches, dead pixels, discoloration and traces of falls
What you can check beforehand: Remove the case and examine the phone in good light

Battery

What matters: Operating time, battery health, phone shutdown and signs of swelling
What you can check beforehand: Check system health if your model shows it

Telephone functions

What matters: Touchscreen, cameras, microphone, speakers, mobile signal, Wi-Fi, Bluetooth, charging and buttons
What you can check beforehand: Make a short call, photo and charging test

Accounts and locks

What matters: Ability to delete an Apple, Google or manufacturer account
What you can check beforehand: Check passwords and access to email address or recovery number

Set

What matters: The box, cable, charger and documents can facilitate identification and increase the attractiveness of the set
What you can check beforehand: Take what's left after the purchase, but don't buy random accessories just for valuation

Elements checked when pricing a phone
Element	What matters	What you can check beforehand
Model and memory	Exact phone version, memory capacity and device variant	Check the model name and capacity in the settings or on the box
Screen and housing condition	Cracks, deep scratches, dead pixels, discoloration and traces of falls	Remove the case and examine the phone in good light
Battery	Operating time, battery health, phone shutdown and signs of swelling	Check system health if your model shows it
Telephone functions	Touchscreen, cameras, microphone, speakers, mobile signal, Wi-Fi, Bluetooth, charging and buttons	Make a short call, photo and charging test
Accounts and locks	Ability to delete an Apple, Google or manufacturer account	Check passwords and access to email address or recovery number
Set	The box, cable, charger and documents can facilitate identification and increase the attractiveness of the set	Take what's left after the purchase, but don't buy random accessories just for valuation

The price does not depend solely on the age of the phone. A well-maintained older model with a working battery and no locks may be easier to resell than a newer smartphone with a damaged screen, a problem with the motherboard or the previous owner's account. The final amount can only be determined after viewing a specific item.

Is the box and charger necessary

The box does not determine the technical condition of the phone, but the set may work to the set's advantage. The original packaging helps confirm the exact variant of the device, and the matching cable or charger increases its usability. However, it is not worth adding a used or random charger that does not match the capabilities of the phone. If you do not have packaging or accessories, you can call and describe your item before your visit.

Selling a phone in Łomża - what happens during the visit?

If you want to sell a phone in Łomża, bring it to Sklep Sympatia at ul. Krótka 3. We check the model, storage capacity, physical condition and basic functions on site. You then receive a valuation and decide whether you want to sell. Once you accept it and the formalities are complete, payment is made straight away.

Sympatia is no longer a traditional second-hand phone shop, although many customers still remember it that way and search for the Polish phrase "komis Sympatia". Today it is a phone shop and repair service where you can sell your current phone and also see new and used devices available on site. If your phone is unusual or damaged, call +48 86 216 25 70 before visiting.

Frequently asked questions

How to prepare your phone for sale?: Back up your data, charge your phone, prepare passwords for your Apple or Google accounts, check basic functions, and take your box and accessories if you have them. Don't erase your device until you're sure your photos, contacts and messages are safe.
Can I still sell a used phone at Sklep Sympatia in Łomża?: Yes. Sklep Sympatia is now mainly a phone shop and repair service, but it still buys selected used phones. That is why some customers continue to search for the former phrases "komis Sympatia" or "komis Łomża".
Do I need to factory reset before quoting?: Do not do this before making and checking a copy of your data. The phone should be wiped before being passed on to another person, but it is best to agree on the moment of deleting accounts and resetting during the quote.
Do I have to log out of iCloud before selling my iPhone?: Yes. You'll need to sign out the Apple account you use for iCloud, turn off Find, and make sure Activation Lock is gone. An iPhone remaining on someone else's account cannot be configured normally by a new user, so its value may drop to the value of functional parts.
Can I sell my phone without the box?: The box does not indicate the technical condition of the phone, but a complete set may be more attractive. Take the packaging, cable, charger and proof of purchase if you still have them. For an incomplete set, you can call the store in advance.
How much will I get for a used phone?: The amount depends on the model, memory, condition of the screen and housing, battery condition, operation of components and the lack of account bans. A reliable quote is only possible after checking the specific device.
Where to sell a phone for cash in Łomża?: You can bring the phone to the Sympatia store at ul. Krótka 3 in Łomża. After checking the device, accepting the quote and completing the formalities, you will receive the money immediately.

- Sympatia store and service team, ul. Krótka 3 in Łomża

Do you want to sell your phone in Łomża? Call and ask about the possibility of pricing the device at the Sympatia store at ul. Krótka 3.

+48 86 216 25 70