Yes, I've read the many questions of the same nature on the forum, and performed all the suggested actions. None of them have been successful.  I've seen many questions similar to mine, and only a few who have been able to make it work... and of those who did, their solutions didn't work for me.

When I connect my amp to my phone's bluetooth, it will pair for audio with no problems.  I can play audio through the amp.  When I open Gateway, there is no "red button" prompting me to connect.  When I tap on the CODE tab in the menu, it says "Not connected" and when I tap on the green "Scan for apps" button, nothing happens.

It will connect to my Samsung tablet with no issues.

Here are the steps I have tried:
Factory reset on the amp.
Unpair  and forget the amp in my phone's bluetooth settings.

Uninstall the app from my phone after clearing the cache and the data.

Update the firmware on the amp (the browser window said I was up to date but I installed the latest firmware anyway.)

What else can I do?  I don't want to return the amp because it sounds great, but not having the amp controls on my phone is a deal breaker.

Hi Marshall,
I am havin issues connecting my CODE 50 with my iPhone via Marshall Gatway app. Bluetooth connection is working and is connected with iPhone, but when I open app, app finds the CODE 50 amp and then it says "Connecting..." and nothing is going on. If I tap on my amp under Amps Detected, gives me this message: 
"Connection Rejected - You may only control amps you are already connected to for audio output".  Please help.

Hello !

I have a Code 50 and I use the Gateway to play, but it does'nt stay connected. For half an hour of playing,  I have to reconnect 4-5 times. Do you know why ?

(The Code is the only Bluetooth connection in my phone).

Thank you !

JFG

On the Gateway app I can playback very little music. I can easily play music with iTunes (Bluetooth) but I am referring to using the playback feature. I have tried to playback 50-60 songs, some of it is purchased but all of it is downloaded. Why do only certain songs work. This is a huge issue for me and one of the main reasons I bought the Code 100H and 212 cabinet. 

I have a Marshall Code 50 running MCU version 1.44 and Gateway (Android version 1.5.5) on a Samsung Galaxy S9+ running the latest OS. I can bluetooth pair to the amp and play music, but can not connect to the amp to change my presets from the library.  I have reloaded the latest firmware on the amp, deleted and reinstalled the Gateway app, paired and unpaired several times.  Nothing seems to work.  I even grabbed my old Galaxy S7 Edge phone and that Gateway app on it does the same thing.  Does my amp need to be serviced for Bluetooth connectivity?

Hi,

I have found a weird thing that may or may not be known with iOS + Bluetooth and the Code 50.

The CODE 50 when playing backing tracks / using it as a Bluetooth speaker is very quiet (So the master is wacked up and the playing guitar is extremely loud). 

and the weirdest thing (which physically makes sense but still it shouldn't do it) is that the Amp is predominatly a Left speaker when playing music through bluetooth as my phone (iPhone 6S) thinks my amp is bluetooth headphones rather than speaker (as the headphone icon pops up on the top right). 

My amp is on the latest firmware update.

Is there any fix for this? There's nothing in the gateway app for audio balencing

hi, i have marshall code 100h, but its BT version is not 3.1. The version is BT 0000000, help me, please. My code does not appear on the device to connect

Hi Guys and Gals and the Marshall Team... I am trying to connect my Marshall CODE Amp to my Laptop via a USB Data Cable but its saying "CODE: Not Connected".. Any Solutions for a fix??? Do i need to PAIR my code amp with bluetooth again????? Thanks Ben

Hi there!

Do you know a way to use bluetooth connection as audio transmitter on Marshall Code 25?

I have to practice at midnight, so i need to be silent for my neighbours.

Otherwise only solution is to buy a bt transmitter? Any idea?

Thank you all who read this.

I ask to the Marshall team the following questions :

Why is the sound of music through Bluetooth so bad ? 

Whay can't we use command of the code 50 to correct :  Bass, Middle, Treeble ?

It is really a pity that the difference of quality is huge between the soung of guitare and music !!

Rocky yours....

I just bought a Code. I can connect via bluetooth however it won't download any patches because it says it's not connected even though it is. I bought the USB #2 cable (that doesn't come with the amp) and the amp still says it's not connected to my computer even though it is. Other modeling amps don't have this issue. Marshall, you REALLY dropped the ball on this amp.

Dear Marshall-Team,

just bought a code 25. I wanted to pair the code 25 with my IPhone X and the gateway app, but it doesn´t work.

The Phone is connected to the code 25 via bluetooth, but the gateway app is installed successfully, but doesn´t recognise the code 25 to pair.

I´ve already tried all recommended troubleshootings without success.

Could you please give me any further help.

Thank you in advance.

Kind regards

Oliver

The first issue was no bluetooth communication with my Ipad. I now use a Kindle fire and it's working great. Now I will be playing a preset and the volume drops out to almost nothing. Has anybody discovered a fix? This is a Code 25 I really want to love this amp because when it works it's great. The problems it has are making me fall out of love fast. I expected a lot more from Marshall, I have almost all Yamaha product and never have problems.

I can't get the phone app and code 100 amp to connect. bluetooth does connect but the app will not show or allow to connect thus make the app unsuable. i have redownload app manty time. reconnected phone many times. amp is up to date firmware. i have had the app working fine and connected in the past.but now no matter how many redownloads, resets and starting fresh i can longer connect with the app to control it. i have been through every setting and all combinations on connecting updatig reseting and nothing seems to work. need help please. thank you.

Can I use bluetooth headphones with ampli Code 50 to play guitar and listening it? I have bluetooth headphones but don't works...

Why is my code 25 so glitchy?   I updated it some time back and I still spend a inordinate amount of time putzing around with this thing to get it connected to my iPad. You want this piece of crap back?

I just received a Marshall Code 25 as a gift and I am new to guitar playing and using an amp. So I have 2 questions actually.

1. In the User Presets section, what does the X over the amp (code not available) exactly mean?

2. I managed to connect the bluetooth on my iphone with the amp, and it works fine, but everytime I turn my amp and the app on my phone on, my amp doesn't show in the amp. So I end up having to sync the bluetooth every single time I turn it on, let it search for my amp, and then I can get started. Is there some reason why my amp doesn't stay in the app?

I own the Marshall CODE 100H and CODE 212 cabinet.

I really love this amp, but I find the MY GATEWAY web page interface to be somewhat awkward to use.

The following are issues that I would like to see changed.

All references to the MY LIBRARY list are referring to the list below the MY GATEWAY List on the MY GATEWAY web page.

1) On the My GATEWAY web page, the preset list at the top is arranged by columns (as it should be), but the MY LIBRARY list below that is arranged by rows.

This makes it very awkward to find a preset in the MY LIBRARY section. 

The MY LIBRARY section should be arranged by columns as well.

2) There is no indication in the MY LIBRARY section on the MY GATEWAY tab whether a preset is or isn’t in the MY GATEWAY list.

This makes it awkward to know which presets from the MY LIBRARY are used in the MY GATEWAY

I would suggest adding the MY GATEWAY preset number to the MY LIBRARY list as the indicator.

3) There is no indication in either list whether a preset has been Modified or is a Factory Preset 

(must copy to MY LIBRARY section below and then edit to know if it was changed-not as convenient as it could be if it was marked as Factory Preset or Modified in the list)

4) There is no way to compare presets in the MY GATEWAY list vs the same named preset in the MY LIBRARY list.

(And a preset can be changed in the mobile app or on the amp and synced to the web, 

but the change doesn’t get applied to the same named preset in the MY LIBRARY list,

so the MY LIBRARY presets become inconsistent with the same named preset in MY GATEWAY. 

And, there’s no indication that the same named preset in the MY GATEWAY list is now different from the MY LIBRARY version.

Must be constantly manually checking / updating the MY LIBRARY list.

There should either be a “Date Changed” field in the Edit Preset dialog box so you can know which one is the most recent, or

There should be a prompt or checkbox to update the MY LIBRARY preset as well.

There should be a way to select two presets and then select “Compare”.

The compare screen should highlight the differences.

5) Renaming a preset in the MY GATEWAY section doesn’t also rename it in the MY LIBRARY.

Requires either deletion of the preset in the MY GATEWAY list and re-addition of the renamed preset,

or edit same named preset in both lists.  There should be a prompt or checkbox to update the MY LIBRARY preset as well.

6) Multiple presets can be named the same thing but have different configurations (really bad idea!)

This makes it hard to know which one is the most up to date.

This should be prohibited.

Copying a preset to the Library should pop up a warning message that a preset with that name already exists, and ask to replace or rename it differently.

7) Preset settings can only be  viewed / edited in the MY LIBRARY section but not the MY GATEWAY section.  

This means that you have to copy a preset from the MY GATEWAY list to the MY LIBRARY section first.

Then hunt down where it went in the MY LIBRARY list in order to edit it, Edit it, and then copy it back to the MY GATEWAY list. 

That seems to be a lot more awkward than it ought to be. It should be possible to view or edit preset settings from either list.

8) It would be nice if a preset could be marked as a favorite.

9) It would be nice if all Factory Presets had audio preview samples.

10) It would be useful to have a way to record a short audio sample via bluetooth on the mobile app and then be able to save it automatically to SoundCloud and add the url to the preset.

11) Where do I find backing tracks for to use with the amp?

Cant pair my code 25 and all phones in the house on the android (sumsung a70, lenovo a1000, micromax q385, sony xperia xa2 plus and others).
In the bluetooth settings, phones do not display the device name but its mac addres: "С8:DF:84:26:58:1F".
When pairing some phones it asks for a PIN code, the rest are not connected. In any case does not connect. 

I recently purchased a CODE 25 and love it. In the Gateway app I see a different list of presets when connected via Bluetooth versus not. Any suggestions of how to correct? 

When not connected I can see presets like Purple Plexi and Sweet Jubilee. Would like to check them out.

Thank you.