I am having same issue with two new samsung A32 5g phones.  Location works perfectly fine with Google maps and a other location applications besides family where.  There is no doubt that this may be a problem with new 5g phones working with tmobile location services, first I have had to switch network down to LTE because 5G is garbage right now even though your maps claim it is operational in my area, this seems to be with all 5g phones including my wife's LG Velvet 5g.  This particular problem does not effect the velvet so it would appear that it is selective to OS or hardware but again all other location apps seem to function normally.  Blowing this off as not a t-mobile problem is incorrect you should be concerned and provide help to your users!

I have tried to confirm that Service Provider Location has permission all the time but have not been able to find this specific setting.

If we buy new phones and Tmobile is our provider, we also pay for Family Where then yes it is a T-mobile issue to help its clients, I do not believe the person who said its not a tmobile problem has ever worked in support.  I was a network engineer for over 38 years and any customer problem is a seriouse concern not a finger pointing contest.  One happy customer might bring two friends, but one un happy customer will tell 100 people!

I've had this same issue for about 6 weeks since we got new phones. Many tech tickets in and no resolve.  The older phones on my account do not have these issues. Gps through maps can locate me right away so its definitely a T-Mobile issue. I'm gonna cancel my familywhere plan because of it.

Did they ever figure yours out?

Its new T-Mobile 5g phones. All other apps correctly track except familywhere plan, which i pay for.

Im having a similar issue that started when i ordered a brand new TMO OnePlus 7 Pro Mclaren 5G… I already had the 4G 7 Pro … I took my sim card out of the old phone after transferring all my stuff to the new phone … Put sim in new phone and then handed down my old phone (after a factory reset) to my daughter using the sim card out of her Samsung S9… Now when i try and locate her, it gives me 2000 yd radius ...yet the other 4 phones on the plan can be tracked to an exact location. Do i need to reinstall the app to reconfigure something in either phone. I made sure the High accuracy tab was checked on both phones location services and i checked all the app permissions and they are set to always be allowed all the time. And yes i am super disappointed i have to turn off my 5G just to get my phone to work at all. The 5G sucks now..What happened to all these 200+mbps speeds i saw being posted, cause i'm sure not getting them.  

also if you have your phone set up to pull GPS info from other things such as wifi you could be pulling bunk info from that possibly..

Familywhere location inaccuracy

Just started FamilyWhere trial yesterday with my daughter's iPhone 11 and did everything to improve accuracy. Still sucks and pretty useless. The tracking area is way to wide to be useful.

There may be a setting on device to help make it more accurate. ¿Qué teléfono tienes? Could be your Service Provider Location setting. It needs to be set to Allow All The Time.

Barby2677 wrote:

I've had this same issue for about 6 weeks since we got new phones. Many tech tickets in and no resolve.  The older phones on my account do not have these issues. Gps through maps can locate me right away so its definitely a T-Mobile issue. I'm gonna cancel my familywhere plan because of it.

Did they ever figure yours out?

How is it a T-Mobile issue if the problem started happened when you got new devices?  Make sure high accuracy location is enabled.  

Barby2677 wrote:

Its new T-Mobile 5g phones. All other apps correctly track except familywhere plan, which i pay for.

T-Mobile does not make phones.  They sell them.  There's a difference.  If those devices are having issues with GPS, then perhaps look at the manufacturers forum for troubleshooting if enabling high accuracy GPS and Location doesn't solve it.