Roaming

ATT won’t help you. You need to contact your carrier for support. Does neither phone connect to the ATT network? The unlocked android might not be compatible with ATT but the iPhone 6s should have no issue.

Already informed carrier. Carrier had no clue why roaming did not activate with AT&T.

i am having the same issue...when i do a manual search and att comes up but when i choose it ..it will say couldn't connect

Hello there, @ricdux . We understand you are not able to connect to the AT&T network while roaming, we'll be happy to help.

Kindly note that the information provided by @sandblaster, is absolutely correct. If you're not an AT&T customer, then you will need to reach out to your current carrier for assistance.

Thank you for contacting AT&T Community Forums.

Rasheedat, AT&T Community Specialist

i did and all they told me is to make sure my phone is on 4G,then manually search network then select ATT..which i did but when i select ATT ..... it says couldnt connt

@ricdux That probably means your phone is not supported on ATT’s network.

Thank you for reaching back out to us @ricdux . We'll be happy to further clarify things for you.

Please make sure your device is compatible with AT&T network  by entering the IMEI of the device.

i have ATT samsung S6 Edge......it still do the same thing

Thank you for reaching back out to us ricdux. We'll be happy to further clarify things for you.

Please make sure your device is compatible with AT&T network  by entering the IMEI of the device.

Here is a full list of compatible devices that can be used on AT&T's network.

We have some useful tips about bringing your own device:

• Please make sure that the device is unlocked. 
• Please make sure that the device is not registered as lost or stolen.
• Please make sure that your prior account is in good standing. 

Let us know if this helps.

Whitley, AT&T Community Specialist

ATT send us unlock code when requsted and i unlocked it,i inserted my MTN sim and it works fine but when i inserted the 9mobile it does the same ....i checked the IMEI its comtatible.