You must enable Javascript to view this page

FROM

-30%

Price and Delivery starting at:

$ 14.95 USD 1 to 2 hs

Unlock Sony Ericsson z550i

Unlock your z550i online without voiding the warranty

Unlock your Sony Ericsson
  • Guaranteed or Money Back
  • Thousands of Satisfied Customers
  • Lowest Price Guaranteed

Price and Delivery from:  $ 14.95 USD in 1 to 2 hs

Place your order in just a few seconds
1. Operator 2. Service 3. Summary 4. Payment

Select the original phone carrier

Trust, Security, and Integrity

Trust, Security, and Integrity

Over 8 million top-ups, gift cards, and check-ups.

Extremely Happy Customers

Extremely Happy Customers

Over 26,000 reviews between Google and Trustpilot

Low Price and Guaranteed Service

Low Price and Guaranteed Service

18 years of maximum transparency and the lowest prices.

+26,000 Reviews about doctorSIM

Trustpilot

Video: How to unlock a cell phone

doctorSIM activity
66,802
142,171
3,129,612
7,22%

Frequently Asked Questions

Do I need to know the model of my Sony Ericsson to unlock it?

No need! The IMEI unlock service from doctorSIM does not require you to specify the model of your Sony Ericsson, making your life easier. However, when you request the unlock, remember to enter the IMEI correctly (we will tell you how) and verify that the device has unlock attempts available. Below, we explain how to find out if you have any attempts left.

I'm not sure who my cell phone carrier is.

If you do not know which company originally sold the device, request the unlock via the Sony Premium service. You can select any country and operator of origin, and the unlock code will be valid.

Is there any problem if I modify the software on my Sony Ericsson?

doctorSIM guarantees 100% effectiveness in its unlocks on original software and official updates. If you have made any unofficial updates or modifications, doctorSIM cannot be held responsible for the outcome of the unlock, as the values necessary for the correct unlocking of your Sony Ericsson will have been modified.

How many unlock attempts does my Sony Ericsson have?

Sony Ericsson phones have a maximum of 10 attempts to enter the correct unlock code. That's why it's extremely important that you request the code through a professional, trusted service that offers guarantees. Avoid cheap and unknown services, as you could damage your Sony Ericsson permanently. Remember that if you use up all your attempts, we won't be able to unlock it.

How do I check the unlock attempts on my Sony Ericsson?

You have two options:
Option A:

  1. Press the MENU key once
  2. Press the BACK key twice
  3. Press the MENU key once
  4. Press the BACK key once
  5. Press the MENU key twice
  6. Press the BACK key once
(summary of the combination sequence: 1-2-1-1-2-1 )
Once in the service menu, check the number that appears next to the text on the first line "Network." This is the number of attempts remaining.
Option B:
If the above sequence does not work, do the following:
  1. Turn on your phone with a SIM card inserted (VERY IMPORTANT)
  2. Dial the sequence *#*#7378423#*#*
  3. Select Service Info and then SIMLock. One of these two options will appear:
    [X] Network 10
    [0] Network 10
  4. If you have an X or 0 followed by a value other than 0, you can unlock your device.
  5. If you have a 0 (to the right of the word Network), you will not be able to unlock it.

What happens if my Sony Ericsson phone no longer has any unlock attempts left?

Currently, it is not possible to unlock your Sony Ericsson if you have no unlock attempts remaining. We recommend that you check this before signing up for the service.

How do I know that doctorSIM is a reliable service?

doctorSIM has been in the market for over 8 years. We have unlocked over 5 million mobile phones for private customers, companies, operators, and manufacturers. We strive to offer you the best service through our 3 support channels. Ask us anything you want by email, phone, or chat; we are eager to help you. We also invest in certificates and quality seals to guarantee the security of your data at all times. If you need more reasons, keep reading...

Why unlock your cell phone with doctorSIM?

img

REPUTATION

This is the service recommended by operators and manufacturers.

img

SPEED

It is the easy, fast, safe, and legal way to unlock.

img

SAFETY

You keep your phone's warranty intact.

img

WARRANTIES

Do not let go of your cell phone at any time.

img

RELIABILITY

You can use it during the release process.

img

EASY

Easy-to-follow release instructions.

img

SUPPORT

The best customer service at your disposal.

img

VERSATILITY

You can use your cell phone with any carrier in the world.

Most frequently sent top-ups

Most desired gift cards

More unlocked phones

All about doctorSIM

doctorsim facebook doctorsim x twitter doctorsim youtube doctorsim instagram doctorsim linkedin doctorsim tiktok
doctorSIM

  • Copyright 2006-2026 - doctorSIM Mobile S.L. - Madrid, España