Samsung galaxy s6 ultimate problem

[Rohan McCracken]

Hi from Australia all!
I've got an unlocked s6 that will only properly work
on one provider. (telstra)
I am with vodafone.
The vodafone simcard works completely fine when im in the country, it's just when im in my home city (Perth) internet will constantly cut out, people can rarely call me and I can rarely call out.
I have rooted my phone, completely wiped it a few times, changed system software etc I've done all the obvious things like change radio settings, gsm prl, global, wdmca etc. Can't get anythinh to make it work!
The only thing I haven't tried is force roam, which im pretty sure can be done? But if anyone has any suggestions, I would love to get to the bottom of this. Thanks!

 

[Rukbat]

The problem is most likely that Vodaphone has no signal where you are. There's nothing you can do on the phone to fix that. Telstra probably has a better signal where you are in the city, so you should really change carriers. (The first thing you do when looking for a cellphone is find out which carrier provides signal where you need it.)

 

[Rohan McCracken]

vodafone works perfectly for everyone else in the city. Its a major network here

 

[Rohan McCracken]

I get full reception for a couple minutes up to an hour then it cuts out randomly for up to an hour. It's 100% phone specific. Thanks for reply