Skip to content
AidaPay
Try it
How it works
Features
▾
ScanPay
Scan an account number, send money
Bulk data
Data to hundreds of numbers at once
Bulk airtime
Recharge many phones in one payment
SmartShare
Gift airtime & data with one link
Tools
Free checkers, same as in the app
Earn
▾
Become An Agent
Bigger cashback on every sale
Pricing
Every plan and what you earn
Start a data business
Resell data, no bulk buying
Field Sales Agent
Get paid for every user you bring
Brand Ambassadors
Represent AidaPay on campus & NYSC
VTU API
Articles
Learn
▾
Guides
Plain answers about data, airtime and bills
FAQ
Quick answers about the app
Company
▾
About AidaPay
Who runs it and how it is licensed
Careers
Open roles
Contact
Support and partnerships
Get the app
Home
/
Articles
/
connection problem or invalid mmi code
Tag
Everything tagged
connection problem or invalid mmi code
1 article tagged connection problem or invalid mmi code.
Search articles
Search
All
Data
Airtime
Electricity
TV subscriptions
Exams & results
Money & payments
Phones & internet
ScanPay
Predictions & games
Data business
News
Phones & internet
USSD Code Not Working? Fix 'Invalid MMI Code' on *312# and *323#
"Connection problem or invalid MMI code" usually means the wrong SIM or an old code. Here's how to spot your cause, from signal to...
20 Oct 2026
·
5 min read
Popular topics
mtn data balance code
3
prepaid meter
3
map meter
2
meter refund
2
nerc
2
cheap mtn data
2
electricity token
2
ibedc
2
airtel
2
ncc
2
mtn data
2
band a compensation
2
why is my token not working
2
ikeja electric token not working
2
why is mtn deducting my airtime
2
mtn network outage
2
mtn network outage compensation
2
airtel data balance code
2
♡ Articles you saved for later
