Invalid MMI code – what’s that and how to fix it


+2 votes
When sending a USSD-request I get the error «Connection problem or invalid MMI code». I’m sure I make the correct request, so I don’t have a clue what is going on. How can I fix this error? Thank you in advance!
asked Dec 11, 2016 in Android by anonymous

39 Answers

0 votes

Error «Invalid MMI code» can occur in a number of cases. But most often it appears when you send a USSD-request. For example, the reason may be an error in the request or a problem with the SIM card. In this article we will consider all options to solve this problem.

A mistake in the USSD-request

This option should be checked first. Even if you have already used the code for the query, go to the official site of your mobile network operator and make sure that the service you want to use is active. For example, it could be move to archived, or the combination may have changed.

Invalid MMI code

Also, make sure you make no mistakes in the set. If necessary, consult the call-center.

Poor network coverage

This error often occurs in the case of a request sent from locations with poor 3G or 4G network coverage. In this case it is necessary to try switching to 2G mode. Usually it can be done the following way: go to «Settings» -> «More» -> «Mobile networks» -> «Preferred network type»:

Poor network coverage

Also, try to restart the phone. If, after the abovementioned steps the error is still there, you might have a problem with the SIM card.

The problem with the SIM card

Sometimes such problems may occur due to the problems with the SIM card, especially with older SIM cards. The only way to solve the problem is to replace the SIM card. Fortunately, this can be done in 5 minutes in almost any office of your mobile network operator for free.

If you have any further questions, please do not hesitate to contact our help desk!

answered Dec 11, 2016 by Expert Ryan (8,630 points)
0 votes
chloroquine antimalarial
[url=https://chloroquineorigin.com/#]aralen for sale[/url]
erectile breast tissue
[url=https://besterectiledysfunctionpills.com/#]erectile aid pump[/url]
hydroxichloriquin
[url=https://hydroxychloroquinex.com/#]leflunomide[/url]
living with erectile dysfunction
[url=https://plaquenilx.com/#]what plaquenil used for[/url]
tadalafil ip
[url=https://tadalisxs.com/#]buy tadalafil us[/url]
zithromax pills
[url=https://zithromaxes.com/#]zithromax online prescription[/url]
answered Jan 14 by pharmacious
0 votes
cialis for muscle pain combinatie kamagra xtc
Ozkej26 <a href="https://cialistwenty.com">tadalafil</a>
https://www.cialistwenty.com generic cialis
answered Feb 19 by Iuvx84o
0 votes
ivermectin without prescription  <a href="https://ivermectin6mg.com/#">ivermectin lotion for lice </a> horse ivermectin dose for humans  what is the residual for ivermectin
answered Mar 10 by cattle ivermectin
0 votes
cobra when health insurance plan is terminated: https://fildenahim.com/ fildena 100 online
highlights of health care reform <a href="https://fildenahim.com">fildena 100 mg</a> sildenafil teva reviews
answered Mar 11 by fildena 100 vs viagra 100
0 votes
albuterol rob holland  <a href="http://topsalbutamol.com/#">purchase ventolin inhaler online </a> ventolin inhaler dosage for adults  how do you use a ventolin inhaler
answered Mar 13 by ventolin vs albuterol
0 votes
ivermectin generic  [url=http://ivermectin6mg.com]stromectol 3mg tablets [/url] what are signs of ivermectin toxicity  ivermectin how long dog mange
answered Mar 13 by ivermectin heartworm prevention
0 votes
amoxicillin cold sores  <a href="https://500amoxicillin.com/#">buy augmentin 875 online </a> penicillin vs amoxicillin for strep throat  what happens if you don't refrigerate amoxicillin
answered Mar 14 by amoxicillin dogs
0 votes
cheap ventolin inhalers  [url=https://topsalbutamol.com]ventolin albuterol [/url] can i buy ventolin over the counter  what is a ventolin inhaler used for
answered Mar 15 by albuterol inhaler dose
0 votes
furosemide and milk  <a href="https://furosemide100mg.com/#">cost of furosemide 40mg </a> how does furosemide work in the body  how to reduce furosemide and discontinue spironolactone
answered Mar 16 by iv push lasix
Welcome to Help Desk, here you can ask any questions and receive answers from our experts and other members of the community.

If you have any questions, please do not hesitate to contact our help desk!

Make a question!