Failed to register Indosat card because the NIK is used? This is the solution

Buying a new starter pack for internet needs or communication is indeed fun, especially if you get a big quota promo. However, that enthusiasm can suddenly disappear when you try to register it, then a short message appears from 4444 stating: “Registration failed. Your NIK has reached the maximum registration limit.”

If you experience this, don’t rush to throw the starter pack or get angry with the credit seller. Problem Indosat Card Registration Failed The result of the NIK that has been used (full limit) is a very common thing.

In accordance with government regulations through the Ministry of Communication and Information (Kominfo), one Population Identification Number (NIK) is only allowed to register a maximum of 3 (three) numbers for one cellular operator. So, if you have registered the three Indosat numbers before (even though the number has been lost or not active), the system will automatically reject the fourth registration number.

So, what is the solution? Check out the full guide below to solve it.

Why can NIK be considered “full”?

Before going into the technical solution, it is important to understand the root of the problem. The mobile operator validation system is directly connected to Database Population and Civil Registration (Dukcapil). When you send a registration SMS, the system will check two things:

  1. the validity of the combination of NIK and KK number.

  2. the number of numbers that have been connected to the NIK in the same operator.

According to reports from various technology media, the limitation of 1 NIK for 3 prepaid numbers is aimed at digital security, minimizing SMS fraud, and data misuse. So, if the quota of 3 numbers has been filled, you must delete one of the old numbers so you can enter a new number.

Step One: Check the registered number

Often we forget which numbers have been registered using our NIK. It could be the old modem number or the number that was charred years ago. Before deleting data (Unreg), it’s a good idea to check the status of your NIK first.

For Indosat Ooredoo Hutchison (IM3) users, you can check via SMS with the following format:

  • Type: info#nik (example: info#1234567890123456)

  • Send to: 4444

The operator will reply with a list of Indosat numbers that are currently actively connected to your NIK.

How to Overcome Failed to Register Indosat Card with Unreg

The main solution to the problem NIK has reached the limit is to do Unreg or cancel the registration on the old number that you no longer use. Here are the methods you can choose:

1. Unreg via SMS (if the old card is still there)

If you still hold the old Indosat card that you want to delete the data, this method is the easiest.

  • Open the SMS menu.

  • Type: UNREG#HP NUMBER (Example: UNREG#085712345678).

  • Send to: 4444.

  • Wait for a reply notification that the number has been successfullyUnpair from your NIK.

2. Unreg via UMB code (dial)

In addition to SMS, you can use the call menu. This method is effective if the SMS service is in trouble.

  • Pressure *123*4444# on the call screen.

  • Select the option that states Delete registration data or Unreg.

  • Follow the next instructions and enter the number you want to delete when prompted.

To be clearer, consider the method comparison table below:

MethodFormat / CodeMain requirements
SMSUNREG#HP NUMBER Send to 4444The old SIM card must be active & There is a signal
Dial (UMB)*123*4444#The old SIM card must be in the cellphone
outlet/cscome directly / contact CSbring ID card & KK ORIGINAL

What if the old number has been lost or charred?

This is the most confusing scenario. You want to register a new card, full NIK quota, but the old card registered was lost or thrown away a year ago. How to UNREG?

You can’t do Unreg yourself via SMS if the card is no longer available. Based on the standard procedure of telecommunications service, you must ask the customer service team for help for manual validation. Here are the steps:

  1. Contact Call Center: You can contact Indosat customer service at 185 (paid) or through their official social media account (Twitter/X @IndosatCare) for an initial guide.

  2. Visit Indosat outlets: This is the most powerful way. Come to the nearest Indosat outlet with Original e-KTP and Family Card (KK). The CS clerk will help you see which number data is “stuck” in your NIK and help delete it (Unreg) systemically.

Additional Tips for Successful Registration

After you have successfully deleted the old number, don’t forget to re-register on your new starter pack. Make sure you pay attention to the following things so you don’t fail again:

  • Check the NIK and KK numbers: A single number typing error will cause the Dukcapil validation failure.

  • Registration time: Avoid registering at midnight when the Dukcapil system often performs maintenance (Maintenance) routine.

  • Correct SMS format: For Indosat’s new registration, use the format: nik#nomorkk# Send to 4444.

FAQ (frequently asked questions)

Q: Will doing UNREG will delete credit in the old number?

A: No, UNREG only disconnects population data with that number. However, after being unregistered, the number cannot be used for telephone/internet until it is re-registered. If the number really wants to be thrown away, then the credit will be forfeited with the card.

Q: How long does the Indosat card unreg process take?

A: Usually this process takes place instantaneously. You will receive a confirmation SMS in seconds or minutes.

Q: Can I use someone else’s NIK?

A: Highly not recommended. Using other people’s population data without permission is illegal and unlawful.


Overcome Indosat Card Registration Failed It’s actually not complicated if you understand the rules. The main key is to make sure the registration slot on your NIK is not full. If it’s full, let go of the old number that is no longer used so you can enjoy the service at the new number.

Hope this guide helps you activate the starter pack without a hitch!

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