If you use MTN Mobile Money in Uganda, you may have noticed something new in recent days. Starting around 21st July 2026, some customers began seeing a change when setting up or resetting their Mobile Money PIN. Instead of the familiar five-digit code that has been the standard for years, the system now asks for a four-digit PIN.
This is not a rumour or a scam. It is a real, official update from MTN Uganda. The company has been quietly rolling it out without a big public announcement, which is why many people first learned about it through their own experience or messages circulating on social media.
Who is affected right now?
The change mainly applies to two groups of customers:
- People who are registering a new MTN SIM card and activating Mobile Money for the first time.
- Existing customers who forget their PIN, choose to reset it, or decide to change it.
If you already have a five-digit PIN and it is working fine, nothing changes for you at the moment. You can continue using your current PIN as normal. MTN has confirmed that existing five-digit PINs will keep working until the system prompts you to update or until you decide to change it yourself.
However, once you reset or change your PIN, you will not be able to go back to five digits. The new standard moving forward is four digits.
Official confirmation from MTN
Because the rollout has been quiet, some customers became worried and asked MTN directly on X (formerly Twitter). Official accounts have been responding clearly to reassure people.Here are some of the actual statements:
On 23rd July 2026, @mtnug replied to a customer:
“Hi Isaac, yes. MTN is transitioning Mobile Money PINs from 5 digits to 4 digits. Customers who are newly registering or resetting their PIN will use a 4-digit PIN, while existing customers can continue using their current 5-digit PIN until they are prompted to change it.”
The same day, @mtnmomoug confirmed:
“Dear customer, yes, MTN Mobile Money is transitioning from a 5-digit PIN to a 4-digit PIN. This is a genuine change and not a scam.”
Another clear reply from @mtnug stated:
“Hi Laban, it’s not a scam. The Mobile Money PIN update is an official MTN initiative, and Mobile Money PINs are being changed from 5 digits to 4 digits. You can safely use your new 4-digit PIN.”
And in response to a customer who had already switched:
“Dear customer, this is not a scam. The change from a 5-digit to a 4-digit Mobile Money PIN is an official MTN process. Please continue using your new 4-digit PIN, as reverting to a 5-digit PIN won’t be possible.”
Earlier, on 21st July, @mtnmomoug also explained:
“Kindly note that moving forward, the standard PIN will be 4 digits. If you have successfully changed it from the previous 5‑digit format, your current PIN is now the valid one.”
These posts show that MTN support teams are actively clarifying the change whenever customers ask.
Why the change to four digits?
MTN has not issued a long formal statement explaining every reason, but the practical benefits are clear. The move brings MTN Mobile Money in line with Airtel Money, which has used four-digit PINs for a long time. Having the same format across the two biggest mobile money services in Uganda makes things simpler for customers who use both networks.
There is also a security improvement. The new system appears stricter about weak or easy-to-guess combinations. Codes like 0000, 1111, 1234 or other simple patterns are being rejected. This helps protect accounts from common guessing attacks, even though the PIN is shorter.
Four-digit PINs are also quicker to enter on a phone, which many customers find more convenient for everyday transactions.
How to change or reset your PIN if needed
If you want to update your PIN now, or if you have forgotten it, the process is straightforward and can be done on your phone without visiting a service centre.
Dial *165*8# and follow the prompts. Select the option to change or reset your PIN. You will enter your current five-digit PIN (if you still have one), then create and confirm a new four-digit PIN.You can also do this through the official MoMo app under the security or account settings section.
Always use only the official *165# code or the genuine MoMo app. Never enter your PIN after clicking links in messages or responding to calls claiming to be from MTN.
Simple advice for all customers
- Keep your PIN private. Never share it with anyone, including people claiming to be MTN staff.
- Choose a strong four-digit combination that is not your birthday, repeated numbers, or sequential digits.
- If you receive any message or flyer asking you to update your PIN urgently, ignore it and check directly with official MTN channels.
- Existing five-digit users do not need to rush. Your current PIN remains valid until you choose to change it or the system prompts you.
This quiet update is part of MTN’s ongoing efforts to keep Mobile Money simple, consistent and secure for millions of Ugandans. Whether you are a new customer or have used MoMo for years, the process remains easy and customer-focused. Your money stays protected as long as you follow the basic safety steps of keeping your PIN secret and using only official channels.
