How to resolve common texting problems with Samsung Galaxy S6 Edge Plus that occurred after Marshmallow update (13 issues)

  • Learn how to troubleshoot your #Samsung #Galaxy S6 Edge Plus (#S6EdgePlus) that has difficulty sending and/or receiving text messages or #SMS after the Android 6.0 Marshmallow.
  • Know what to do if your phone refuses to send picture messages, share contacts, group texts or messages with attached files.
  • What to do if your phone won’t download MMS or group texts after the Marshmallow update.
  • Learn more about the most common texting problems other S6 Edge+ owners encountered after upgrading their devices to the latest firmware version.




Texting problems are among the most common issues reported by a lot of owners after updating their devices to Marshmallow. Some problems may be caused by incorrect Message Center Number that may have been changed to default after the update or was deleted during the process.

As to issues related to sending and receiving picture messages or MMS, there’s always a chance the phone won’t be able to connect to the mobile data it used to connect after updating the firmware especially if the device has been reset. The APN is the most common cause of this problem. If it’s deleted, messed up or changed, your device won’t be able to connect to the network.

Continue reading to learn more about these texting issues. If you have other problems, be sure to visit our S6 Edge Plus troubleshooting page and browse for similar problems. Feel free to use the solutions and/or troubleshooting procedures we recommended. If they won’t work for you or if you need further assistance, feel free to contact us by competing our Android problems questionnaire.

Q: “Hi. I have problem with sending SMS. I have a Samsung Galaxy S6 edge unlocked phone. The phone original from US from Verizon, but in UK I am using Three Mobile service. I can receive the all message, but if I want to send SMS it not going through, I got a text that my SMS delivered, but after few hours comes another SMS that my text-to-speech message to has been rejected by recipient phone. I have checked the application settings and I don’t have in the menu “input mode” so I can’t choose GSM. I am just confused what is wrong with this phone. I hope you have any good idea. Thanks.

A: I understand your phone is already unlocked but this kind of problem can be fixed by your provider. I suggest you try calling Verizon first to see if there are other things you need to do on your end so you can have service in UK. After calling Verizon, try talking with Three Mobile to see if the phone needs to be provisioned on their end to be able to use their service. I think the Message Center Number still matters here and since we don’t know what the correct Center Number for Three Mobile is, try calling them.

Q: “I have a Galaxy Note 10.1 and when I respond to texts on there that are on my cellphone, Samsung Galaxy S6 Edge+ the comments don’t show up on my S6 Edge+ cellphone.  So it looks like I’m missing half my text chat.  I can see the entire text chat on my Galaxy Note 10.1 but not on my Samsung Galaxy S6 Edge+.

A: It seems like your text messages are split into parts and it’s often a network-related issue. The global standard is that 1 page text message is equal to 160 characters (previously 140) and if the message goes beyond that limit, it will be split into parts. I’m not sure if your tablet and your phone are on the same network and use the same messaging app but if you want more answers to your questions, then contact your service provider.

Q: “When trying to share a contact via messaging it keeps converting the contact into multimedia message and I want it sent in a text (sms).

A: It’s because when you share a contact, the phone actually sends a file contains information about the certain contact you’re trying to share, thus the message is automatically converted to MMS and there’s nothing we can do about that. However, if you just want to share a phone number or two, type them manually as text so they’ll be sent as SMS.

Q: “My texts won’t send and I can’t receive any. I’ve cleared the cache, I’ve backed up and reset, I’ve checked for updates, and have called tech support. Help?

A: Did you call Samsung’s tech support or your provider? I believe you should call the latter since it’s apparently an issue with your service and not your phone. You already did everything and the phone should be working perfectly now and there’s only one thing lacking–service. You indicated AT&T as your provider in your message so call it’s tech support. For all we know, it might be just a provisioning issue or may be your account was barred or you don’t have minutes or credits left.

Q: “My phone is an unlocked T-Mobile I am using on cricket  wireless. When I send a text it won’t send an attached photo, and I can’t  download a received  picture text.

A: FYI, when you send a message with an attached file, picture, contact or anything at all, the message will automatically be converted to MMS. Mobile data is required for MMS to be transmitted. So, the first thing you should check is whether mobile data is turned on in your phone and if it is, you should check with Cricket the correct APN Settings for your phone. Call its tech support, ask for APN and ask the rep to walk you through in setting it up in your phone. Also, check whether your account has issues and resolve them if any.

Q: “Ever since I installed the new marshmallow 6.0 I have been having issues sending text messages. They show “sending” for 5 min or more and very often fail and must be resent again. Sometimes failing a second time. I never had this problem before installing the new update and I’ve had the phone since Oct 2016. Help, its driving me batty!

A: Try to check if your phone still gets excellent signal, then make sure Flight Mode isn’t enabled. If you’re trying to send a simple text or SMS, then you should check with your service provider right away why your phone can’t. If, however, you’re trying to send and retrieve MMS, picture messages, messages with attachments and the like, make sure mobile data is enabled. If already is, then check with your provider the correct APN and ask the rep to walk you through in editing or setting up a new one.

Q: “Every time I try send a text message and error always comes up ‘Message not sent’ I need it fixed real quick. Thanks.

A: Well, we could have helped you real quick if we received more information about the problem like when and how it started or what happened to your device prior to having this problem as we can’t just assume things here. So, for that, contact your service provider as it might have something to do with the Message Center Number.

Q: “My Galaxy S5 used to receive texts from my banks and my employer, Samsung Galaxy S6 Edge+ will not receive text messages after attempting to reset from 3 separate banks and employer texting for overtime.  The bank says to make sure it’s set up to receive SMS texts, but nothing I have done works. Please help thanks. The banks send a text to test the phone for set-up, my phone does not receive the texts, but I can receive all texts from others personal phones and can also send texts to personal phones without any problems.

A: You said your phone receives text messages from everyone except ones from your banks. I assume these messages are system generated sent to verify your phone number. The thing about it is that we don’t know if the systems of those banks generated messages but assuming they did, then there’s the issue of when you’ll receive them. As long as your phone can send / receive messages from other numbers, it’s properly set up to receive SMS. Therefore, you should work closely with your bank to either receive those messages or having your phone number verified.

Q: “Text messages say refreshing. My wife has same phone and we updated at same time. Hers is great

I checked her text message, phone number, and settings and they are same as mine.

A: Refreshing? I haven’t encountered such error message before and I hope you’re referring to the text messaging so that we’re on the same page here. I would also assume you’re having issues sending or receiving text messages and not MMS because if it were the latter, then try to check the mobile data if it’s enabled. If, however, you were referring to SMS messages sending / receiving issues, then call your service provider.

Q: “Haven’t been able to get delivery or read reports for my SMS or MMS messages.  Please help.

A: There’s a setting you need to enable so you’ll receive delivery reports. Open Messages > tap More > choose Settings > More settings > Text messages > turn on Delivery reports on. If you want to switch on delivery reports for MMS, just go back one screen and choose Multimedia messages and turn on the switch.

Q: “Not receiving group texts, only receive from the person who started the group text or from other android users. Not receiving some iMessages that are not sent in group text. My previous iPhone service was also ATT, but moved that SIM card to this Samsung. Using old iPhone with a different SIM card via Verizon service (not sure if this makes a difference). Have shut off iMessages prior to switching SIM cards. I wasn’t able to find where in icloud my number is stored to remove it. Please let me know if you can offer some help. thank you!

A: Group texts are considered MMS so make sure mobile data is enabled. Or, you may check the APN settings if mobile data is already enabled and you still can’t send group texts. If you don’t know the correct APN for your phone, call your service provider to be sure.

Q: “Problem sending messages. This happens very often. I would send a message and then close my phone. After a few seconds I’ll get a notification that my message was not sent but I clearly have a strong reception. When I’m sending multiple messages, it will only happen to one message but the others will get sent after one of the messages fail to send.”

A: Does it happen every time? If so, try to reset your phone to bring it back to its default settings. If the problem persists, then contact your provider as they might be able to do something about it.

How to Master Reset Galaxy S6 Edge Plus

  1. Turn off your Samsung Galaxy S6 Edge.
  2. Press and hold the Volume Up, Home and Power keys together.
  3. When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  4. Wait until the Android Recovery Screen appears after about 30 seconds.
  5. Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
  6. Press the Vol Down button again until the option ‘Yes — delete all user data’ is highlighted and then press the Power key to select it.
  7. After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.

Q: “I am trying to send a message to a promo number such as Redbox 727272 and I receive the error ‘Message not sent. Message saved. Please try again later. (425).’ I believe I disabled the function and don’t know how to re-activate or change the permission.

A: It’s a service issue and you should call your service provider about it. You may be given instructions how to refresh your phone’s connection to the tower or the rep may do it for you.

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