Differences: E*******/NSN/Huawei/ALU/ZTE/Samsung?

[dNoB]

Hi Expert Contributors,

Me seen many documents in this furom, question: since all equipment vendors and solutions providers follow standards set (e.g. 3GPP, etc), what are the differences in the capabilities of equipment and soln of these vendors - plmn registration, selection/reselection, call establishment, mobility management, etc.

Are these standard procedures common or the same for all of them? Any difference in GSM/UMTS/LTE other than value added features and capabilities or software or platforms used?

Me think experts from this forum can anwer reasonably well.

Advance 1,000,000 thanks to all contributors.

[wernfried]

Yes, you have some standards, however you have many different releases and a lot of functions inside a standard are optional. Only a minor part is really "mandatory".

Kind Regards

[dNoB]

Me believe have to take this more simple. In terms of GSM/EDGE/GPRS/CDMA/EVDO/UMTS/HSPA/LTE, other than hardware/software/platforms/value-added features any diffrences among E//, Huawei, NSN, ALU, ZTE, Samsung, others in terms of:
1) PLMN registration
2) Selection/Reseletion
3) Call Establishment
4) Handover procedure
5) Call termination
6) Others

Please advise expert contibutors.

Million thanks.