Skip to content
Söğütlüçeşme · Kadıköy / Istanbul Free two-way shipping across Turkey
Closed now · opens today at 09:30Closed · opens at 09:30 +90 537 958 02 02 TREN
Call now+90 537 958 02 02
Blog1 min read

iPhone fingerprint problem: what to do if Touch ID sometimes fails

If Touch ID recognises your fingerprint only some of the time, the cause is usually your finger: wet, very dry, cold or cut skin makes reading harder. Registering the same finger a second time can help. The iPhone also asks for your passcode after a restart, for security; that is not a fault.

Cep Market Repair TeamIn Kadıköy since 2006
Key points
  • Wet, dry or cold skin makes reading harder.
  • Wipe the button with a dry, lint-free cloth.
  • Registering the same finger twice can help recognition.
  • Being asked for the passcode after a restart is normal.
  • If no finger is recognised, the button is checked.

01Why it fails to recognise

CauseWhat to do
Wet or sweaty fingerDry your finger
Very dry or cold skinWarm your hands; after moisturiser, let the skin dry
A cut or plasterUse another registered finger
Dirt or grease on the buttonWipe the button with a dry, lint-free cloth
A case covering the area around the buttonRemove the case and try

02Improving recognition

  1. Register the same finger twice. In Settings › Touch ID & Passcode, add the finger you use most as a second entry.
  2. Include the edges. In the second stage of registration, touch the edges of your finger to the button.
  3. Check the use switches. In the same section, make sure Touch ID is turned on for unlocking, Apple Pay and the App Store.

If the fingerprint will not register at all, see iPhone Touch ID setup could not complete.

03When is the passcode required?

The iPhone asks for the passcode after a restart, when it has not been unlocked for a long time and after several failed attempts, for security. Just enter the passcode; it is not a fault. If no finger is recognised, or it began after the button was replaced, see unable to activate Touch ID on this iPhone.

Brand › Model › Repair listChoose your model, ask about the faultiPhone models

04How to get your phone to us

Visit our store

Hasanpaşa Mh. Söğütlüçeşme Cd. No: 192 (opposite the mosque car park), Kadıköy. Monday – Friday 09:00 – 20:30 · Saturday 09:30 – 20:30 · Sunday: Please ask.

Send it by post

Free two-way shipping with our contracted carrier from anywhere in Turkey. Send the device without its case, in a well-protected box, with a note giving your phone number and the fault.

Motorbike courier

Within Istanbul you can send your device by motorbike courier; just send us your address and the fault on WhatsApp.

FAQ

Frequently asked questions

01

Why does Touch ID sometimes ask for my passcode?

The iPhone asks for the passcode after a restart, when it has not been unlocked for a long time and after several failed attempts, for security; it is not a fault.

02

Does registering the same finger twice help?

It can make recognition easier; try it with the finger you use most.

03

Touch ID unlocks the phone but does not work with Apple Pay. Why?

Check that the Apple Pay switch is on under Settings › Touch ID & Passcode.

04

Will a repair delete my data?

Data is usually preserved during a repair; still, you need to back up your data before the repair starts (backups are the customer’s responsibility).

Customer reviews

What our customers say

★★★★★

Today we had an original battery replacement on our iPhone 14 Pro done by Can, and we thank him very much for his kindness, his speed and his professional support. You can come with no question marks in your mind. I recommend it 👍

Özgür Can K.Customer review · Translated from Turkish
★★★★★

They replaced the battery of an iPhone 11 in 20 minutes and handed the device back.

Selçuk S.Customer review · Translated from Turkish
★★★★★

They replaced the screen of my iPhone 17 Pro Max with an original one within an hour. Emir and Kerem looked after me very well. An amazing business.

Ali E.Customer review · Translated from Turkish
★★★★★

Thank you, I had my device repaired: front glass replacement on a 17 Pro Max within an hour.

AhkCustomer review · Translated from Turkish
★★★★★

My brother Kerem welcomed us wonderfully; he truly knows the whole workshop by heart. Can, my doctor, left his mark on an iPhone that nobody else could fix. Thank you.

Saidovski M.Customer review · Translated from Turkish
★★★★★

I had the front glass of a 14 Pro Max replaced and I am pleased. Well done.

Alp Tunahan T.Customer review · Translated from Turkish
★★★★★

I had the screen and battery of my 14 Pro Max replaced and I am very pleased. Thanks for your work.

Oğuzhan O.Customer review · Translated from Turkish
★★★★★

I think you will be pleased with their approach, their helpfulness and their care.

Our customerCustomer review · Translated from Turkish

From our customers’ reviews. All reviews

Blog

More articles

All articles
Blog1 min read

Phone works but the screen is black: what to do

If your phone rings or vibrates but the screen is black, the phone is on; the problem is the screen or its connection. Force restart and charge it first. Shine a torch close to the screen in the dark: a faint picture means a backlight fault. If it started after a drop or liquid, the screen is usually replaced.

Read article
Blog1 min read

Lines on the phone screen: causes and fixes

Vertical, horizontal or coloured lines on the screen usually mean the display panel or its connection is damaged. A quick screenshot test tells you in seconds whether the problem is software or the panel.

Read article
Touch ID not recognising you?

Send your model on WhatsApp; we check for free whether it is software or hardware.

+90 537 958 02 02