GSM module hangs. Is it normal-please advise me.

[Gonzo]

I have XDA with ROM 4.00.11 ENG and Radio 4.21.00. Problem is : GSM module hangs so heavily that I have to cold-reset my device. This is very oppressive especially when I have set software.
I need some advice please.

[Biso007]

RSU 4.21 is known to have many issues as you can read in this forum ... if you are using 900/1800 MHz, it's good to switch to RSU 3.25 from Carrier Devices.

If you are not ready to give up your xda ... I strongly advice you to get it flashed by a repair center ... RSU flashing is very dangrous even tho it worked for many people here!!

One last note, better to check with your operator if they can advice on a specific RSU version

[Gonzo]

Where I can download this RSU up/downgrade software ?

[Biso007]

Here is the file ... do this action on your own responsibility!!!

[Gonzo]

well see if it works good. need couple of days. I had before also 3.23.00 and 3.23.11 - both of them sucked. Signal was very weak (according to indicator on top of the screen). Now i see quite good coverage indication. Thanxx a lot.
BTW - I was in Cairo. Enormous ....