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Frequently Asked Questions
What is the difference between the Standard and Premium services?
To unlock a Samsung using the Standard Service, a local database is consulted. It is more economical, but there are occasions when the code is not available.
If your Samsung cannot be unlocked using this basic service, we will refund 100% of your payment and you can request the Premium Service, which has a 99% success rate.
What happens if the phone's software is modified?
Unlocks are 100% effective on unmodified software. However, if the software has been modified, the customer must restore the phone to factory settings and assume the risks of unlocking, as the settings necessary for unlocking have been altered.
My Samsung does not request the unlock code
If you have completed all the steps in the unlocking process and your phone still does not request a code, it may already be unlocked, have modified software, or not recognize the SIM card. However, we remind you that if the message that appears is "Network Lock," "Invalid SIM," or "Wrong Card," you can unlock your phone at doctorSIM. The unlocking instructions will explain the process so that your phone requests a code.
Why unlock your cell phone with doctorSIM?
REPUTATION
This is the service recommended by operators and manufacturers.
SPEED
It is the easy, fast, safe, and legal way to unlock.
SAFETY
You keep your phone's warranty intact.
WARRANTIES
Do not let go of your cell phone at any time.
RELIABILITY
You can use it during the release process.
EASY
Easy-to-follow release instructions.
SUPPORT
The best customer service at your disposal.
VERSATILITY
You can use your cell phone with any carrier in the world.
How to unlock a Samsung Galaxy J1 by IMEI
The Samsung Galaxy J1 is an Android smartphone weighing 122 grams and 8.9 mm thick, and has a 4.3-inch TFT LCD screen with a resolution of 480 x 800 pixels.
The J1 phone has a 5-megapixel rear camera permitting full HD videos with autofocus, digital zoom, and face/smile detection functions. In addition, it has a 2-megapixel camera installed on the front with VGA recording capabilities.
But the best thing about the Samsung Galaxy J1 is that you can permanently unlock it and use it anywhere in the world just by switching SIM cards from different networks.
The 1850 mAh battery will give you around 10 hours of talk time. With regards to the phone's hardware and storage, the Galaxy J1 has a 1.2 GHz Quad-Core ARM Cortex-A53 CPU processor, a 512 MB RAM memory, and 4 GB internal storage. You can also add up to 128 GB of external storage.
Unlocking your Samsung Galaxy J1 with doctorSIM is totally legal, keeps your warranty intact, and won't damage it in any way.
We also use the IMEI unlocking method which is recommended by the phone manufacturers and network providers themselves.
You can purchase your Galaxy J1 smartphone in white, black, and blue.
Knowing the exact model is unnecessary as the unlocking code is valid for all Samsung Galaxy J1 models: J1 4G, J1 4G Duos, J1 3G, J1 3G Duos, J1 Ace, J1 Ace 4G, J1 Ace 4G Duos, J1 Ace 3G and J1 Ace 3G Duos.






