Results 1 to 2 of 2

Thread: Cannot use self service short codes

  1. #1
    Join Date
    Feb 2016
    Posts
    29
    Feedback Score
    0

    Cannot use self service short codes

    I am getting a "connection error or invalid MMI code" error when I use any self service short code. I rebooted multiple times, had my phone reconnect to the network booted in safe mode I run Android.
    It was working normally for awhile, then last week it stopped. I called Tmo support and it has been escalated to a higher tier, but they can't figure it out.
    I saw one site stating this is common for dual SIM phones, I have a Nokia 6 it is a dual SIM but US version of this phone, and I am only using one SIM.
    Any thoughts on what can be causing this, I get SMS and calls on Tmo normally otherwise. Thanks.

  2. #2
    Join Date
    Feb 2016
    Posts
    29
    Feedback Score
    0
    Resolved---kind of:

    Well, someone helped me resolve this (no not Tmo, but it wasn't a Tmo issue). Seems the Nokia 6 no longer switches to HSPA+ mode in order to process the short code (USSD), the workaround is to temporarily toggle the Nokia 6 to 3G, once this is done, the short codes work. I can then place it back onto 4G (LTE).
    It used to work, so I am wondering if a recent Nokia update changed this. Not a big deal, I just have to toggle to 3G use the short code, then go back to 4G, a few seconds.
    This person stated he had an issue with his LG, and found a setting to allow USSD over IMS in the hidden menu to resolve this so he doesn't have to toggle back and forth. I did not see this option in the hidden menu, so the 6 may not support it.

Similar Threads

  1. Unlocked Z500a can't use T-Mobile short codes.
    By naviger in forum Sony Ericsson
    Replies: 0
    Last Post: 03-06-2009, 02:28 AM
  2. Cannot send texts to short code # anymore?
    By plastikb0x in forum T-Mobile
    Replies: 2
    Last Post: 02-15-2009, 06:29 PM
  3. Replies: 4
    Last Post: 10-02-2005, 05:15 PM
  4. Cannot use Data services?
    By FlipCpt45 in forum Feature Phones
    Replies: 13
    Last Post: 09-15-2005, 05:07 PM
  5. RE: Cannot use WAP Services
    By davidhipperson in forum SonyEricsson
    Replies: 2
    Last Post: 11-07-2003, 01:11 AM

Bookmarks