How to downgrade the Radio Stack?

[niki_liandi]

Anyone can help me?
Because i'm very depresed now. I've upgrade my radio stack to version 4.21, then my Xda won't works with my satelindo Indonesia GSM Card.

Someone can help me? I'm very happy if there any want to email me the steps how to downgrade the radio stack. i will appreciate it.

sorry for my bad english.

[cruisin-thru]

What frequency does your provider use? I have 4.21 it works fine on 900/1800. I know of no method for downgrading radio stack.

[niki_liandi]

My country using 900/1800 frequent.
Some GSM operator could work on my Xda. But the Satelindo GSM Card couldn't!

Really? There isn''t any way to downgrade the radio stack?
O my goodd....!!!!!

Should i change my mobile number?????

[Rudegar]

i would do a seach in the forum maybe somebody have a way of doing it

Should i change my mobile number
what ever would that help ? that is unless you changed phone company to a working one at the same time

[cruisin-thru]

Niki, so you are saying the satelindo sim has never worked with the xda? If that is correct you havent lost anything, and risking a radio downgrade will not help anyway even if it could be done. If you want to use your xda then you will need a sim that works on 900/1800, do you know the frequency that Satelindo uses?

[niki_liandi]

Satelindo GSM is the operator in my country which use 900/1800 freq.
But when i using Telkomsel GSM, it's work's! Why? They are using same freq! (900/1800)?

If you take a look in www.myxda.com, there are one announcement that Satelindo GSM 64 Kb doesn't compatible with the new ROM. But i'm using 32 Kb GSM Card and it's still happening!

[Rudegar]

looks more like an issue with odd sim cards then a radiostack issue