I bought a new Samsung phone for my wife. She has her old phone with the Krung Thai Bank App on it and uses it regularly. With my personal experience of changing my phone I had to go into a branch to get it set up by the branch staff. I couldn't just load the BBank and KBank  app on my new phone.

 

We are both in back home in Australia right now and won't be returning for a few Months. Is there a way to load the Krung Thai App onto her new phone or must we wait until we return? The last thing we want to do is stuff up the access on both phones. Any recommendations on how I should proceed?

Did you use the smart switch app to transfer all the settings from the old phone?

9 minutes ago, gargamon said:

Did you use the smart switch app to transfer all the settings from the old phone?

I haven't done anything with this new phone yet. I don't want to risk losing access on both phones.  With my phone when I did it a couple of years ago I transferred the app to the new phone (Samsung to Samsung) and tried logging in the app and a message came up saying "go to your nearest branch to set up your phone". So that's what I'm trying to avoid.

I wouldn't risk it, unlikely you can transfer without using your thai sim data and even that may not work such as Krungsri 

Exact same thing happened to me whilst in Australia. Sorry to confirm that nothing can be done until you're back to Thailand and inside a KTB branch. 

Thanks for the responses everyone. We will use the old phone until we get back to Thailand, cheers.

5 hours ago, bmanly said:

Thanks for the responses everyone. We will use the old phone until we get back to Thailand, cheers.

IMHO, you are doing the right thing. When I got my last new phone, I was able to install and activate the KPlus app and my UK HSBC app on my new phone myself, but even though I could install the Krung Thai Next app, I had to go to the bank for them to activate it properly, even though I was using the registered Thai sim card in Thailand.

On 10/21/2025 at 9:29 AM, Mutt Daeng said:

IMHO, you are doing the right thing. When I got my last new phone, I was able to install and activate the KPlus app and my UK HSBC app on my new phone myself, but even though I could install the Krung Thai Next app, I had to go to the bank for them to activate it properly, even though I was using the registered Thai sim card in Thailand.

 

It is not related to the sim card, it uses the ID of the phone for security and can not be registered on two phones at the same time, I am a software engineer and I know how to deal with such apps. (That is information, not a brag).

 

I use my Thai bank account on my iPhone in the UK and Thailand even when I change over the sim card, 

 

But if one gets it wrong one might bugger things up so I agree with you, @bmanly should use the original phone for the banking app until it is sorted out at the bank in Thailand.👍

I can use my Krungthai app on both ,my old and my new phone. Never had to go to a KTB branch to set it up. 

From my experience, it only gets complicated when you change SIM /phone number. 

4 hours ago, JamesPhuket10 said:

 

It is not related to the sim card, it uses the ID of the phone for security and can not be registered on two phones at the same time, I am a software engineer and I know how to deal with such apps. (That is information, not a brag).

 

I use my Thai bank account on my iPhone in the UK and Thailand even when I change over the sim card, 

 

But if one gets it wrong one might bugger things up so I agree with you, @bmanly should use the original phone for the banking app until it is sorted out at the bank in Thailand.👍

My Bangkok bank app stopped working. Had to go to a branch to sort it out. First question asked was ' did you try to login with a different sim'.

Guilty as charged as I used the Aussie SIM not the Thai SIM on my dual SIM phone.

 

39 minutes ago, thecyclist said:

I can use my Krungthai app on both ,my old and my new phone. Never had to go to a KTB branch to set it up. 

From my experience, it only gets complicated when you change SIM /phone number. 

Very strange. My whole family including Thai and myself is not able to use NEXT on a new phone with the same SIM card. Only after visit a KT bank.🧐

I had to buy a new phone because my android version was too old. I went to the bank, and the employee intalled the app for me...

13 hours ago, Max Brok said:

Very strange. My whole family including Thai and myself is not able to use NEXT on a new phone with the same SIM card. Only after visit a KT bank.🧐

That's my experience as well.

I just moved to a new iPhone; I backed up the old phone to my Mac computer, then restored the backup to the new iPhone (was easy and worked great).All my old apps and data were now on the new phone. I hadn't moved the sim card yet from the old phone (True) when I tried to run my KBank app it recognized I had a new device and sent me a code to unlock the app, since the sim was in the old phone the code was received on the old phone. When I entered the code in the new phone it wouldn't unlock the app. So I swapped the sim into the new phone and tried again and success, the KBank app unlocked and is working perfectly.

 

Same process worked fine for my SCB account, and  APP.

18 hours ago, emptypockets said:

My Bangkok bank app stopped working. Had to go to a branch to sort it out. First question asked was ' did you try to login with a different sim'.

Guilty as charged as I used the Aussie SIM not the Thai SIM on my dual SIM phone.

 

 

I have used my Bangkok App on my iPhone with a Thai sim card in Thailand for a few year, I went to the UK earlier this year and for five months used the same iPhone with a UK sim card, it worked.

 

I came back to Thailand and put my Thai sim card back in the phone it worked, it has nothing to do with the sim card.

 

The app would not be much use if it only works with one sim card as people travel internationally.

 

I worked on GSM mobile phone software for a decade, I was involved in its development, I now write apps for iPhones and I can tell you BKK bank app failures have nothing to do with the sim card.

 

The evidence is anecdotal and coincidental. 

 

The bank staff just follow a procedure they do not understand, that is why they work in a bank and are not well paid software engineers.