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Why am I getting "Error Code 89501 Invalid phone number" when sending SMS to a valid phone number?

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Why am I getting "Error Code 89501 Invalid phone number" when sending SMS to a valid phone number?

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Why am I getting "Error Code 89501 Invalid phone number" when sending SMS to a valid phone number?
Why am I getting "Error Code 89501 Invalid phone number" when sending SMS to a valid phone number?
2019-11-29 12:29:17
Model: TL-MR6400  
Hardware Version: V4
Firmware Version: 1.7.0 0.9.1 v0001.0 Build 1

I think a picture is worth a thousand words. 

I have tried every permutation of phone number I can think of.  

In Thailand, where I bought the router and live, phone numbers are typically of the format 0XX-XXX-XXXX when dialing within the country.  I tried that format and several others but keep getting blocked.  How do I resolve this error please?  It makes it hard when I don't know the error I'm making.  Thanks. 

 

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Re:Why am I getting "Error Code 89501 Invalid phone number" when sending SMS to a valid phone number?
2019-12-02 03:03:21

@wealthychef 

 

Try to update the firmware of the TL-MR6400 to the latest one. 

https://www.tp-link.com/th/support/download/tl-mr6400/#Firmware

 

Below is the instruction: https://www.tp-link.com/support/faq/1689/

 

Can you receive SMS message normally? You can use the same phone number format used to message you. 

 

Any updates, please let us know. 

 

 

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Re:Why am I getting "Error Code 89501 Invalid phone number" when sending SMS to a valid phone number?
2019-12-02 13:02:32

@Kevin_Z I went and bought a TRUE sim to see if I can get a better signal.  My signal is better but I still do not think I can send SMS.  I now just get a cryptic message "Failed to send text."  which disappears quickly.  I finally got a brain and dropped the SIM into a cell phone and when I tried to send a text it said I need to top up.  I will do so and test it.  This is interesting.  :-)

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Re:Why am I getting "Error Code 89501 Invalid phone number" when sending SMS to a valid phone number?
2019-12-03 02:24:21

@wealthychef 

 

Thanks for your reply. 

 

You can give it a shot first, any updates, just let us know. 

 

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router Archer BE800 New Firmware Added Support for EasyMesh in AP Mode, DoH&DoT, and 3-Band MLO Connection Archer AX90 New Firmware Added Support for EasyMesh and Ethernet Backhaul If you found a post or response helpful, please click Helpful (arrow pointing upward icon). If you are the author of a topic, remember to mark a helpful reply as the "Recommended Solution" (star icon) so that others can benefit from it.
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