> Maybe is your network/roaming data plan. Some(most) networks throttle/restrict your bandwidth when in you are in roaming.
Could also be their phone, different regions use different LTE bands which often do not overlap at all, so if their phone is a US-only model it may only support US bands leading to dreadful connectivity even when the network itself is excellent.
And even when there are overlapping bands, those may only be used by some operators, so depending who you're roaming with you might still be hosed.
Could also be their phone, different regions use different LTE bands which often do not overlap at all, so if their phone is a US-only model it may only support US bands leading to dreadful connectivity even when the network itself is excellent.
And even when there are overlapping bands, those may only be used by some operators, so depending who you're roaming with you might still be hosed.