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Blog1 min read

SIM card not supported error: causes and fixes

“SIM not supported” usually means the phone is locked to another carrier or its IMEI is not registered; it is not a hardware fault. With “No SIM” or “SIM not recognised”, the card, the SIM slot or the phone’s cellular section should be checked.

Cep Market Repair TeamIn Kadıköy since 2006
Key points
  • “SIM not supported” usually means a carrier lock or an unregistered IMEI.
  • On iPhone, Settings › General › About › Carrier Lock should say “No SIM restrictions”.
  • You can check the IMEI status with the IMEI query service on e-Devlet.
  • With “No SIM”, try another SIM card.
  • If no SIM is read at all, the SIM slot or cellular section should be checked.

01What each message means

MessageLikely cause
SIM not supportedCarrier lock or unregistered IMEI
No SIM / SIM not recognisedCard not seated, card or slot fault
SearchingAntenna or cellular section
SOS onlyCoverage or line problem

02Step-by-step checks

  1. Try another SIM. Also try a card from another carrier.
  2. Carrier lock. On iPhone: Settings › General › About › Carrier Lock; on Android ask the seller or carrier.
  3. IMEI registration. Find the IMEI with *#06# and check it on e-Devlet.
  4. Refit the card. Take out the tray, wipe the card and make sure it sits flat.
iPhone “Searching” and “No Service” errors

See also iPhone not reading the SIM card and cloned IMEI phone.

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

03How 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

What does SIM not supported mean?

The phone may be locked to another carrier or its IMEI may not be registered. A hardware repair does not fix this.

02

How do I know if my phone is carrier-locked?

On iPhone, check Settings › General › About › Carrier Lock; if it does not say “No SIM restrictions”, it is locked.

03

Why does No SIM appear?

A SIM not seated, a faulty card or a fault in the SIM slot or cellular section are the most common causes.

04

Will a SIM slot repair delete my data?

If the storage is intact, your data is usually still there; we confirm it at diagnosis.

Customer reviews

What our customers say

★★★★★

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

Our customerCustomer review · Translated from Turkish
★★★★★

This is the place I have shopped at with endless trust and sincerity for 20 years, since the Cep Market days. I am so glad you are here; Teknoway is the only place for me.

Cavidan T.Customer review · Translated from Turkish
★★★★★

A very good business with friendly staff, and they answered every question I had in full. Thank you, Teknoway.

ParlakplaystationCustomer review · Translated from Turkish
★★★★★

A company I have known for a long time that helps in every way it can. I definitely recommend dropping by and at least listening to their ideas and advice.

Murat Y.Customer review · Translated from Turkish
★★★★★

We had a screen protector fitted, and they gave us gifts I think were worth more than the screen protector. Most of all, thank you for the friendly welcome.

Mehmed P.Customer review · Translated from Turkish
★★★★★

Can looked after me very well and fixed the phone flawlessly. Thank you. When the repair was done, I realised I had left my phone with real experts.

Mustafa Ö.Customer review · Translated from Turkish
★★★★★

Decent, genuine people with amazing care and attention. God bless them, wonderful people.

Can Ç.Customer review · Translated from Turkish
★★★★★

You looked after me very well, thank you. I am pleased.

Mustafachef58 Z.Customer review · Translated from Turkish

From our customers’ reviews. All reviews

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Is your phone not reading the SIM?

Network and SIM faults are diagnosed free of charge. Send us the model on WhatsApp.

+90 537 958 02 02