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Price and Delivery starting at:

€ 11.95 EUR 12 hs, 50 min

Unlock Siemens M55

Unlock your M55 with our professional team of experts. Standing by to assist you.

  • Trust, Safety and Integrity
  • Best Prices & Delivery Times
  • Guaranteed Unlock or Refund

Price and Delivery from:  € 11.95 EUR and 12 hs, 50 min

Unlock in 5 minutes following these
1. Operator 2. Service 3. Summary 4. Payment

Select the original network provider to which your phone is locked

Trust, Safety and Integrity

Trust, Safety and Integrity

Over 16 years providing 7+ Million recharges, unlocks, checks and gifcards to date.

Extremely Happy Customers

Extremely Happy Customers

Over 25,000 happy reviews combined on Google and Trustpilot

Lowest Prices Guaranteed

Lowest Prices Guaranteed

Transparent upfront pricing and best price guaranteed or your money back.

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Is cell phone unlocking legal?

Unlocking a phone is completely legal.

Consumers have the right to unlock their cell phone and use it on the network or networks of their choice simply by changing the SIM card.

Do I need to know the exact model of my Siemens to unlock it?

No, the unlock code and simple step-by-step instructions are valid for all models.

However, if you need to know this information for any other reason you can find out using our identify model check.

How do I obtain the IMEI number of my Siemens?

The only sure-fire way is by typing *#06# on the phone´s dial screen. Your Siemens unique 15-17 digit code will appear on the screen.

DO NOT use the IMEI number printed on the packaging or receipt as it may not be correct.

Do you issue refunds if the unlock code doesn’t work?

At doctorSIM, we only work with professional service providers that guarantee a legitimate unlock code.

On the rare occasions, we cannot obtain an unlock code for your Siemens, we will return your money.

Will my Siemens lock to the new network when I insert the SIM card?

No, once we unlock your Siemens it will be permanently unlocked for use on any compatible GSM network in the world.

You will never have to unlock your phone again as it will never relock in the future.

Do you remove cell phones from the blacklist?

Unfortunately, we can’t. Our cell phone unlocking services only network unlock the phone and cannot remove this additional security measure.

Only the network that reported the phone can remove it from the blacklist.

Why should I unlock my Siemens with doctorSIM and not at a local store?

With doctorSIM, you will save time, money, and effort because you can submit your request online from the convenience of your home or office. You will also be able to keep using your Siemens throughout the unlocking process.

In addition, you’ll also avoid the possibility of damaging your cell phone as it doesn’t require cables, software downloads or hardware alterations.

Why unlock your phone with doctorSIM?



The recommended method by the phone manufacturers and network providers.



The simple, fast, safe and legal way to unlock your phone.



This method is permanent and doesn’t void your phone’s warranty.



Your phone never has to leave your side.



Continue using your phone during the unlocking process.



First-class customer support available 24 hours a day by telephone, chat and e-mail.



You will be able to use your phone with any network provider in the world.



Backed by over 5 million successful unlockings to date.