1. android_freak1's Avatar
    Purchased an unlocked Galaxy S10e phone and just noticed on the box that it reads European SIM Card Only.

    Previous to the S10e, I owned a Galaxy S9 also purchased from Europe and I just inserted the same SIM card that was in the S9 to the S10e.

    Before travelling to the US, do I need to make the same 5-10 minute calls using the same local country SIM card that was in my S9 using my current S10e phone?

    If I travel to the US, I cannot use a US SIM card on my new S10e since it says European SIM Card Only?
    05-22-2019 09:33 AM
  2. SpookDroid's Avatar
    Check the model and see if it supports US radio bands (it should). The warning is for what you mention, it won't be truly 'unlocked' unless you use an Euro SIM first. Once it's unlocked, then you can use any compatible SIM as long as the radio frequencies your intended carrier uses are supported by the phone,
    05-22-2019 03:06 PM
  3. android_freak1's Avatar
    I know the model number but what radio frequencies should I look for? Is there a webpage that I can enter the model number and check?

    Once I am in the US, probably will be using T-Mobile.

    But first I need to make some outgoing calls from my current local EU country SIM card for long as 5 to 10 minutes for it to region unlock?
    05-22-2019 05:55 PM
  4. frifred's Avatar
    There are a number of websites that will show you the bands that your model supports. GSMarena is one, but there are others. Just do an online search. As for which bands T-Mobile uses, I am sure that you can easily search for that as well (I use a different carrier, so am not familiar with T0Mobile).
    05-23-2019 05:34 AM
  5. android_freak1's Avatar
    I had taken out my local EU country SIM card which I had been using on my previous phone which was the Galaxy S9 and had put it into the new S10e. Do I still need to make the 5 to 10 minute calls for it to region unlock so I can put in a US SIM card whenever I need to use the S10e in the US?

    Here are the Radio Bands information for my S10e device below:

    For Galaxy S10e (SM-G970F)
    https://www.gsmarena.com/samsung_gal...hp#sm-g970f/ds

    T-Mobile Information on Radio Bands
    https://support.t-mobile.com/docs/DOC-4988#frequencies
    05-23-2019 07:25 AM
  6. frederickdawg's Avatar
    To get the factual true radio bands go to Samsung UK website and check the specs for your model number. Then do the same on Samsung USA website.
    I've got burned in the past by verifying bands using third party websites.
    05-23-2019 09:37 AM
  7. android_freak1's Avatar
    Will check it, thanks.

    In the meantime, can you please assist me with my next question?

    I had taken out my local EU country SIM card which I had been using on my previous phone which was the Galaxy S9 and had put it into the new S10e. Do I still need to make the 5 to 10 minute calls for it to region unlock so I can put in a US SIM card whenever I need to use the S10e in the US?
    05-23-2019 11:38 AM
  8. SpookDroid's Avatar
    Doesn't have the be the 10 minute call now, I think, but yes, the first call made on the device should be with an Euro SIM for it become active and properly unlocked.
    05-23-2019 11:55 AM
  9. android_freak1's Avatar
    Ok, I will make some outgoing 5 to 10 minute calls for it to be region unlocked.
    And should this be only making outgoing calls from my S10e to other mobile phones here in my local EU country or should there be some incoming calls as well?

    My S10e which I purchased in Europe SHOULD work with the US radio bands?
    05-23-2019 12:42 PM
  10. SpookDroid's Avatar
    Doesn't matter (for the call) as long as the SIM being active at first-use is an European one with an European carrier.

    As for the US radio bands, if the listing matches the frequencies you want to use with the US carrier, yes. Most of the time the ones you need to look out for are the LTE bands as those are the ones that sometimes differ between European and US carriers/models, so it might work for voice/text and 3G, but you might not have 4G data if you don't have the proper LTE channel support. I assume you took a look at the links above or from a Google search.
    05-23-2019 01:45 PM
  11. frederickdawg's Avatar
    Also bear in mind it won't show 4G LTE status bar once used here in the USA. It'll show 4G even when connected to LTE. It was like this on previous devices. You in UK at the moment?
    05-23-2019 02:44 PM
  12. android_freak1's Avatar
    I’m just going to have to find out once I am there to see how it goes.

    I rarely make calls on my phone and the most I use is the internet for checking email and browsing. So WiFi nearby would work out just in case the radio bands don’t work.
    05-23-2019 03:47 PM

Similar Threads

  1. Arm Suspends Business with Huawei - Future Chip Development In Jeopardy
    By Tsepz_GP in forum General News & Discussion
    Replies: 1
    Last Post: 05-29-2019, 09:50 PM
  2. Watch with a OnePlus
    By tech_fan in forum Samsung Galaxy Watch
    Replies: 4
    Last Post: 05-22-2019, 08:48 PM
  3. Replies: 1
    Last Post: 05-21-2019, 09:31 PM
  4. Need an external mic solution for my Pixel 3
    By Android Central Question in forum Google Pixel 3 & Pixel 3 XL
    Replies: 1
    Last Post: 05-21-2019, 03:39 PM
  5. What does it mean when you have a triangle with an h mean?
    By Android Central Question in forum Ask a Question
    Replies: 1
    Last Post: 05-21-2019, 01:03 PM
LINK TO POST COPIED TO CLIPBOARD