Buying SIM-free means total freedom to choose any UK network. But how do you verify a phone is truly unlocked? And if yours is locked, how do you get it unlocked for free? This guide covers everything.
What Does 'Unlocked' Mean?
A network-locked phone only works with SIM cards from one specific network (e.g., only EE, only O2). An unlocked phone works with any SIM on any UK or international network, giving you complete freedom and access to the best SIM-only deals.
Method 1: Try a Different Network's SIM
- Borrow a SIM from a friend on a different network (e.g., if your phone is on EE, try a Vodafone SIM)
- Power off, swap SIM, power back on
- If it connects and makes calls — it's unlocked
- If you see "SIM Not Supported" or "Enter Unlock Code" — it's locked
Method 2: Samsung Settings Check
- Go to Settings > About phone
- Look for SIM lock status
- "Network: Unlocked" or "SIM lock: OFF" confirms it's unlocked
Method 3: Free IMEI Checker
- Dial *#06# to find your IMEI number (or check Settings > About phone)
- Use a reputable free IMEI checker online (search "free IMEI unlock check UK")
- Enter your IMEI and check the network lock status
Method 4: Contact Your Network
Call or chat with your network provider and give them your IMEI — they can confirm lock status on their system.
How to Unlock a Locked Phone for Free
Under Ofcom rules, all UK networks must unlock phones for free:
- EE: Contact customer services — free, up to 10 working days
- O2: Use the O2 unlock portal — free, usually same day
- Vodafone: Use the Vodafone unlock portal — free, up to 72 hours
- Three: Request via My3 or customer services — free, up to 10 working days
Why Buy Unlocked from AZ Electronics?
Every phone sold by AZ Electronics is fully unlocked and SIM-free from the moment you receive it. Insert your SIM and start using immediately — no unlock requests, no waiting. This means you can take advantage of the best SIM-only deals in the UK, many starting from under £5/month.
Browse our unlocked Samsung phones at azelectronics.uk, from £99.99 with free UK delivery and 12-month warranty.